Medicare Enrolled
Dr. Amy McMullen, M.D.
Internal Medicine · Santa Cruz, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. McMullen from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. McMullen
Dr. Amy McMullen is an internal medicine specialist in Santa Cruz, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. McMullen performed 148,043 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. McMullen received a total of $18,536 from 96 pharmaceutical and/or device companies across 932 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. McMullen is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 0% volume in CA
$18,536 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗148,043
Medicare services
Top 0% in CA for internal medicine
Not available
Unique patients (not deduplicated)
$24
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Daratumumab injection (Darzalex) An injection containing daratumumab and hyaluronidase-fihj administered under the skin. |
37,260 | $38 | $83 |
| Pembrolizumab injection (Keytruda) | 32,500 | $38 | $92 |
| Iron infusion (Injectafer) An intravenous injection of ferric carboxymaltose, an iron replacement medication. |
22,500 | $1 | $2 |
| Denosumab injection (Prolia/Xgeva) | 22,140 | $19 | $40 |
| Anti-nausea injection (aprepitant) | 18,330 | $1 | $3 |
| Anti-nausea injection (Aloxi/palonosetron) | 3,160 | $1 | $67 |
| Dexamethasone injection (steroid) An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram. |
2,532 | $0 | $5 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
1,181 | $8 | $25 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,081 | $77 | $155 |
| Normal saline infusion, 250 cc Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid. |
825 | $1 | $40 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
790 | $104 | $209 |
| Intravenous chemotherapy infusion, 1 hour or less Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete. |
646 | $122 | $360 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
591 | $12 | $45 |
| Additional sequential IV infusion, 1 hour or less This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less. |
508 | $27 | $85 |
| Non-hormonal chemotherapy injection This procedure involves administering non-hormonal anti-neoplastic chemotherapy medication via injection into the skin or muscle tissue. |
497 | $68 | $140 |
| Intravenous injection of additional new drug or substance Administration of an additional new medication or substance directly into a vein. |
445 | $14 | $65 |
| Carboplatin chemotherapy injection, 50 mg Administration of a 50 mg dose of carboplatin, a chemotherapy medication, via injection. |
325 | $2 | $48 |
| Normal saline infusion, 500 ml Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution. |
318 | $1 | $40 |
| Concurrent intravenous infusion Administration of medication or fluid into a vein for therapy, prevention, or diagnosis while another infusion is being given. |
265 | $18 | $55 |
| Zoledronic acid injection, 1 mg An injection of zoledronic acid administered at a dose of 1 mg. |
258 | $7 | $21 |
| Additional hour of intravenous chemotherapy This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period. |
170 | $26 | $65 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
165 | $152 | $290 |
| Intravenous infusion of new drug or substance, 1 hour or less This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less. |
163 | $60 | $145 |
| Leuprolide acetate (for depot suspension), 7.5 mg | 131 | $134 | $450 |
| Intravenous infusion, 1 hour or less Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less. |
117 | $59 | $140 |
| Lidocaine HCl injection for IV infusion, 10 mg Administration of a 10 mg dose of lidocaine hydrochloride via intravenous infusion. |
109 | $0 | $20 |
| Additional hour of intravenous hydration This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy. |
108 | $12 | $30 |
| Subcutaneous or intramuscular chemotherapy injection This procedure involves administering anti-cancer hormonal medication through an injection into the tissue under the skin or into a muscle. |
95 | $29 | $85 |
| New patient office visit, complex (60-74 min) | 94 | $173 | $350 |
| Additional hour of intravenous infusion This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis. |
92 | $19 | $43 |
| Diphenhydramine injection, up to 50 mg An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams. |
86 | $1 | $10 |
| Intravenous hydration infusion, 31-60 minutes Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes. |
75 | $30 | $95 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
72 | $8 | $15 |
| 5% dextrose/water (500 ml = 1 unit) | 69 | $1 | $40 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
67 | $32 | $85 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
51 | $1 | $40 |
| Unclassified drug A medication that does not fit into standard HCPCS or CPT classification categories. |
51 | $1 | $35 |
| Extended office visit by clinical staff, first hour An extended office or outpatient visit provided by clinical staff lasting at least one hour. |
46 | $18 | $36 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
36 | $145 | $290 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
25 | $34 | $50 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
24 | $75 | $90 |
| Irrigation of implanted venous access device This procedure involves flushing an implanted venous access device to clear blockages or maintain patency. It ensures the device remains functional for delivering medications or fluids. |
16 | $24 | $60 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
16 | $234 | $447 |
| Injection, fosnetupitant 235 mg and palonosetron 0.25 mg | 13 | $414 | $1,250 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
17.3% high complexity
80.1% medium
2.6% routine
Industry Payment Transparency
Open Payments through 2024 ↗$18,536
Total received (2018-2024)
Avg $2,648/year across 7 years
Top 6% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
96
Companies
932
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$3,460
2023
$3,497
2022
$2,902
2021
$2,152
2020
$682
2019
$3,028
2018
$2,815
Payments by company (2024)
AstraZeneca Pharmaceuticals LP
$320
PFIZER INC.
$218
Merck Sharp & Dohme LLC
$201
Incyte Corporation
$153
Lilly USA, LLC
$144
Eisai Inc.
$140
Novartis Pharmaceuticals Corporation
$136
Exelixis Inc.
$129
ABBVIE INC.
$122
GENZYME CORPORATION
$121
E.R. Squibb & Sons, L.L.C.
$121
Genmab U.S., Inc.
$88
Blueprint Medicines Corporation
$84
GlaxoSmithKline, LLC.
$84
TerSera Therapeutics LLC
$82
Alexion Pharmaceuticals, Inc.
$79
EMD Serono, Inc.
$67
Genentech USA, Inc.
$66
Pharmacosmos Therapeutics Inc.
$63
Celgene Corporation
$63
Takeda Pharmaceuticals U.S.A., Inc.
$60
ARRAY BIOPHARMA INC
$58
PharmaEssentia USA Corporation
$56
Gilead Sciences, Inc.
$54
Daiichi Sankyo Inc.
$52
Acrotech Biopharma Inc.
$48
Rigel Pharmaceuticals, Inc.
$46
Spectrum Pharmaceuticals Inc.
$45
BeiGene USA, Inc.
$43
Apellis Pharmaceuticals, Inc.
$42
Janssen Biotech, Inc.
$40
SERVIER PHARMACEUTICALS LLC
$37
Kite Pharma, Inc.
$34
Organon Llc
$33
Aveo Pharmaceuticals, Inc.
$32
JAZZ PHARMACEUTICALS INC.
$32
Ipsen Biopharmaceuticals, Inc
$30
Immunocore Limited
$29
Boehringer Ingelheim Pharmaceuticals, Inc.
$27
PUMA BIOTECHNOLOGY, INC.
$27
Bayer Healthcare Pharmaceuticals Inc.
$24
Fennec Pharmaceuticals, Inc.
$22
ACCORD HEALTHCARE, INC.
$21
Octapharma USA, Inc.
$20
Sirtex Medical Inc
$19
Regeneron Healthcare Solutions, Inc.
$17
Novocure Inc.
$15
Astellas Pharma US Inc
$13
Top 3 companies account for 21.4% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$1,556
Novartis Pharmaceuticals Corporation
$931
PFIZER INC.
$892
E.R. Squibb & Sons, L.L.C.
$871
Janssen Biotech, Inc.
$850
Takeda Pharmaceuticals U.S.A., Inc.
$708
Amgen Inc.
$696
Genentech USA, Inc.
$689
Lilly USA, LLC
$687
GENZYME CORPORATION
$617
Seagen Inc.
$568
Merck Sharp & Dohme Corporation
$542
Astellas Pharma US Inc
$475
Merck Sharp & Dohme LLC
$450
Exelixis Inc.
$433
Bayer HealthCare Pharmaceuticals Inc.
$419
Daiichi Sankyo Inc.
$397
Incyte Corporation
$365
Gilead Sciences, Inc.
$323
Eisai Inc.
$301
Alexion Pharmaceuticals, Inc.
$266
Kite Pharma, Inc.
$250
Rigel Pharmaceuticals, Inc.
$238
TerSera Therapeutics LLC
$219
EMD Serono, Inc.
$203
Taiho Oncology, Inc.
$201
JAZZ PHARMACEUTICALS INC.
$176
Blueprint Medicines Corporation
$169
Boehringer Ingelheim Pharmaceuticals, Inc.
$165
ARRAY BIOPHARMA INC
$163
Regeneron Healthcare Solutions, Inc.
$159
GlaxoSmithKline, LLC.
$148
ABBVIE INC.
$144
Seattle Genetics, Inc.
$142
Pharmacyclics LLC, An AbbVie Company
$137
Ipsen Biopharmaceuticals, Inc
$132
Celgene Corporation
$129
PharmaEssentia USA Corporation
$114
Acrotech Biopharma LLC
$104
EISAI INC.
$94
Octapharma USA, Inc.
$91
ADC Therapeutics America, Inc.
$90
Genmab U.S., Inc.
$88
AbbVie, Inc.
$85
Puma Biotechnology, Inc.
$81
Karyopharm Therapeutics Inc.
$77
AMAG Pharmaceuticals, Inc.
$75
SERVIER PHARMACEUTICALS LLC
$74
AVEO Pharmaceuticals, Inc.
$72
Acrotech Biopharma Inc.
$69
Mirati Therapeutics, Inc.
$69
Pharmacosmos Therapeutics Inc.
$63
Teva Pharmaceuticals USA, Inc.
$63
Spectrum Pharmaceuticals Inc.
$62
MorphoSys, US Inc.
$61
Clovis Oncology, Inc.
$60
Jazz Pharmaceuticals Inc.
$58
Apellis Pharmaceuticals, Inc.
$58
BeiGene USA, Inc.
$56
Coherus Biosciences Inc.
$55
CTI BioPharma Corp.
$54
Novocure Inc.
$52
ACCORD HEALTHCARE, INC.
$50
Pharmacyclics LLC, an AbbVie Company
$48
ImmunoGen, Inc.
$46
Myovant Sciences Inc.
$37
Dova Pharmaceuticals
$37
Sirtex Medical Inc
$36
Organon Llc
$33
Aveo Pharmaceuticals, Inc.
$32
Stemline Therapeutics Inc.
$32
Deciphera Pharmaceuticals Inc.
$32
Sun Pharmaceutical Industries Inc.
$31
SOBI, INC
$31
Progenics Pharmaceuticals, Inc.
$30
Sobi, Inc
$30
Immunocore Limited
$29
Secura Bio, Inc.
$27
PUMA BIOTECHNOLOGY, INC.
$27
Sumitomo Pharma America, Inc.
$27
Bayer Healthcare Pharmaceuticals Inc.
$24
Epizyme, Inc.,
$23
Organon LLC
$23
Roche Diagnostics Corporation
$23
AbbVie Inc.
$22
Fennec Pharmaceuticals, Inc.
$22
Aadi Bioscience, Inc.
$21
Mylan Institutional Inc.
$20
Advanced Accelerator Applications
$20
Array BioPharma Inc.
$17
TAIHO ONCOLOGY, INC.
$16
Verastem, Inc.
$15
Global Blood Therapeutics, Inc.
$14
Agios Pharmaceuticals, Inc.
$13
Shire North American Group Inc
$12
MEDIVATION FIELD SOLUTIONS LLC
$2
Top 3 companies account for 18.2% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · ALIMTA · ALTUVIIIO · ALUNBRIG · ANDEXXA · AYVAKIT · Alecensa · Aliqopa · Aranesp · Avastin · BELEODAQ · BENDEKA · BESREMI · BLENREP · BOSULIF · BRAFTOVI · BRUKINSA · Bavencio · Blincyto · Braftovi · CABLIVI · CABOMETYX · CALQUENCE · CAMCEVI · CHANTIX · COPIKTRA · COSELA · CYRAMZA · Cabometyx · Copiktra · DARZALEX · DOPTELET · Doptelet · ELAHERE · ELIQUIS · ELITEK · ELZONRIS · EMPLICITI · ENHERTU · ENJAYMO · EPKINLY · ERBITUX · ERLEADA · EXKIVITY · Elahere · Empaveli · Enhertu · Epkinly · Erleada · FARYDAK · FASLODEX · FERAHEME · FOTIVDA · FRUZAQLA · FYARRO · Fabhalta · Fulphila · GAVRETO · GAZYVA · GILOTRIF · HEMADY · Halaven · IBRANCE · ICLUSIG · IDHIFA · IMBRUVICA · IMFINZI · INFLECTRA · INJECTAFER · INLYTA · Imbruvica · JADENU · JAKAFI · JAYPIRCA · JEMPERLI · JEVTANA · KEYTRUDA · KIMMTRAK · KISQALI · KRAZATI · Kyprolis · LENVIMA · LIBTAYO · LONSURF · LUMAKRAS · LUTATHERA · LYNPARZA · Lenvima · Lonsurf · MEKINIST · MONJUVI · MONOFERRIC · MVASI · MYLOTARG · NAVIFY Products · NERLYNX · NINLARO · Nerlynx · Neulasta · Nexavar · Nplate · Nubeqa · OCTAGAM IMMUNE GLOBULIN (HUMAN) · OJJAARA · ONCASPAR · ONTRUZANT · OPDIVO · ORGOVYX · OXBRYTA · Odomzo · Oncaspar · Oncology · Onivyde · Optune Lua (NovoTTF-200T) · Orserdu · PADCEV · PANZYGA · PLUVICTO · PROMACTA · PYLARIFY · Pedmark · Perjeta · Polivy · QINLOCK · Quzyttir · REBLOZYL · RETEVMO · ROLVEDON · RYDAPT · Rezlidhia · Rituxan Hycela · Rubraca · SARCLISA · SCEMBLIX · SIR-Spheres Microspheres · SOLIRIS · SOMATULINE DEPOT · SPRYCEL · SUTENT · Stivarga · TABRECTA · TAGRISSO · TASIGNA · TAZVERIK · TECENTRIQ · TECVAYLI · TEPMETKO · TEVIMBRA · TIVDAK · TUKYSA · Tavalisse · Tazverik · Tibsovo · Trodelvy · ULTOMIRIS · Udenyca · Ultomiris · VENCLEXTA · VERZENIO · VONVENDI · VOTRIENT · VYXEOS · Venclexta · Vitrakvi · Vonjo · WILATE · XALKORI · XOSPATA · XPOVIO · XTANDI · Xermelo · Xofigo · Xospata · Xtandi · Yescarta · ZEJULA · ZEPZELCA · ZOLADEX · Zoladex
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Internal medicine physicians in nearby ZIP areas
1,014
County median income
$109,266
Nearest hospital to ZIP centroid (approximate)
DOMINICAN HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. McMullen is a mixed practice specialist, with above-average Medicare volume (top 0% in CA), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. McMullen experienced with daratumumab injection (darzalex)?
Based on Medicare claims data, Dr. McMullen performed 37,260 daratumumab injection (darzalex) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. McMullen receive payments from pharmaceutical companies?
Yes. Dr. McMullen received a total of $18,536 from 96 companies across 932 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. McMullen's costs compare to other internal medicine physicians in Santa Cruz?
Dr. McMullen's average Medicare payment per service is $24. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. McMullen) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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