Michael Hamman, MD
NPI 1538346911 · MOHS-Micrographic Surgery Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Micrographic Dermatologic Surgery (mds) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Hamman, MD is a MOHS-Micrographic Surgery Physician provider in San Diego, CA (NPI 1538346911).
Provider details
- NPI number
- 1538346911
- Entity type
- Individual
- Primary specialty
- MOHS-Micrographic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A97551 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,098 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Removal and Microscopic Exam of Growth of Head, Neck, Hands, Feet, Or Genitals, 1-5 Tissue Blocks17311 | 279 | $635 |
| Removal and Microscopic Exam of Growth of Head, Neck, Hands, Feet, Or Genitals, Each Additional Stage, 1-5 Tissue Blocks17312 | 217 | $460 |
| Intermediate Repair of Wound of Scalp, Underarms, Trunk, Arms, Or Legs, 2.6-7.5 Cm12032 | 85 | $238 |
| Removal and Microscopic Exam of Growth of Trunk, Arms, Or Legs, 1-5 Tissue Blocks17313 | 68 | $678 |
| Intermediate Repair of Wound of Face, Ears, Eyelids, Nose, Lips, Or Mouth, 2.6-5.0 Cm12052 | 67 | $179 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 215 | 192 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 36 | 31 |
| Cephalexin | 21 | 21 |
| Imiquimod | 20 | 17 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 19 | 17 |
| Fluorouracil | 14 | 13 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,218 across 54 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-01-28
- Last updated
- 2024-12-19
- Certified
- 2024-12-19
Frequently asked questions
- What is Michael Hamman's NPI number?
- Michael Hamman's National Provider Identifier (NPI) is 1538346911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Hamman's specialty?
- Michael Hamman is listed in the NPPES registry with a primary specialty of MOHS-Micrographic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Hamman located?
- Michael Hamman's practice location on file with NPPES is 9339 Genesee Ave Ste 350, San Diego, CA 92121-2150.
- What is Michael Hamman's phone number?
- The practice phone number listed in the NPPES registry for Michael Hamman is (858) 454-4300.
- Does Michael Hamman accept Medicare?
- Michael Hamman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Hamman's NPI active?
- Yes — Michael Hamman's NPI (1538346911) is active in the NPPES registry as of the last update on 2024-12-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.