Doctor profile · Federal record
Dr. Zachary Fellows, M.D.
Rheumatology Physician (CMS: Rheumatology) · Obesity Medicine (Internal Medicine) Physician · Internal Medicine Physician · Carlsbad, CA
- NPI 1154733152
- Accepts Medicare
- MIPS 80.7 / 100 · 2023
- 12 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
6120 Paseo del Norte Ste L2
Carlsbad, CA 920111149
(760) 891-4687
fax (760) 684-8715
Credentials & registration
- NPI registered
- May 2014 — 12 yrs on file
- Profile last updated
- January 18, 2026
- Year of graduation
- 2014 — 12 yrs since
- Specialty taxonomy
- 207RR0500X — NUCC code
- State license (1)
- California #A144510
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1154733152. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
15,178
Distinct HCPCS
10
Medicare allowed
$362,081
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J1602 |
Injection, golimumab, 1 mg, for intravenous use | 13,200 | 15 | $13 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 777 | 298 | $149 | |
J3301 |
Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 577 | 109 | $1 | |
96365 |
Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | 120 | 27 | $84 | |
76882 |
Limited ultrasound scan of joint or other extremity structure except blood vessels | 81 | 49 | $49 | |
20600 |
Aspiration and/or injection of fluid from small joint | 61 | 35 | $55 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 60 | 50 | $210 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 60 | 47 | $106 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 57 | 57 | $251 | |
20610 |
Aspiration and/or injection of fluid from large joint | 46 | 28 | $85 |
In context: peer comparison
Among 1 peers in this city , average services per provider: 1,011. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$3,553
Transactions
63
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Kyowa Kirin, Inc. | 5 | $1,916.01 | |
| Amgen Inc. | 10 | $348.00 | |
| Lilly USA, LLC | 10 | $234.82 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 6 | $212.28 | |
| ABBVIE INC. | 9 | $180.70 | |
| GlaxoSmithKline, LLC. | 6 | $133.52 | |
| ANI Pharmaceuticals, Inc. | 4 | $101.66 | |
| Janssen Biotech, Inc. | 5 | $93.33 | |
| UCB, Inc. | 2 | $39.48 | |
| Mallinckrodt Hospital Products Inc. | 1 | $39.44 | |
| Genentech USA, Inc. | 1 | $34.07 | |
| Fresenius Kabi USA, LLC | 1 | $32.42 | |
| Octapharma USA, Inc. | 1 | $30.16 | |
| Aurinia Pharma U.S., Inc. | 1 | $28.90 | |
| Pacira Pharmaceuticals Incorporated | 1 | $26.03 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,298
Patients
410
Total drug cost
$56,099
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Hydroxychloroquine Sulfate | Generic | 245 | 74 | $19,054 |
| Prednisone | Generic | 225 | 78 | $2,389 |
| Methotrexate (Methotrexate Sodium) | Brand | 158 | 47 | $8,194 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 97 | 30 | $2,855 |
| Meloxicam | Generic | 73 | 28 | $657 |
| Gabapentin | Generic | 72 | 21 | $2,929 |
| Alendronate Sodium | Generic | 66 | 20 | $840 |
| Duloxetine Hcl | Generic | 65 | 20 | $2,367 |
| Allopurinol | Generic | 61 | 15 | $877 |
| Diclofenac Sodium | Generic | 47 | 19 | $5,452 |
Frequently asked questions
What is Dr. Zachary Fellows's medical specialty?
Dr. Zachary Fellows practices Rheumatology Physician in Carlsbad, CA.
Where does Dr. Zachary Fellows practice?
Dr. Zachary Fellows practices at 6120 Paseo del Norte Ste L2, Carlsbad, CA 920111149. Office phone: 7608914687.
What is Dr. Zachary Fellows's NPI?
Dr. Zachary Fellows's National Provider Identifier (NPI) is 1154733152, issued by NPPES.
Does Dr. Zachary Fellows accept Medicare assignment?
Yes. Dr. Zachary Fellows accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Zachary Fellows commonly perform?
Top Medicare-reported procedures in 2023: Injection, golimumab, 1 mg, for intravenous use (HCPCS J1602); Established patient office or other outpatient visit (HCPCS 99214); Injection, triamcinolone acetonide, not otherwise specified, 10 mg (HCPCS J3301). Source: CMS Medicare Physician & Other Practitioners file.