Don Hammi, MD
NPI 1235287269 · Internal Medicine Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Don Hammi, MD is a Internal Medicine Physician provider in San Diego, CA (NPI 1235287269).
Provider details
- NPI number
- 1235287269
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A90556 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
935 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 628 | $114 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 255 | $112 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 52 | $167 |
Typical Medicare-allowed amounts for these services range $112–$167 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 38 | 38 |
| Cefuroxime Axetilbrand: Cefuroxime | 36 | 36 |
| Pantoprazole Sodium | 30 | 30 |
| Oxycodone Hcl | 17 | 17 |
| Prednisone | 15 | 14 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 14 | 14 |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2011-05-03
Frequently asked questions
- What is Don Hammi's NPI number?
- Don Hammi's National Provider Identifier (NPI) is 1235287269, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Don Hammi's specialty?
- Don Hammi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Don Hammi located?
- Don Hammi's practice location on file with NPPES is 4647 Zion Ave, San Diego, CA 92120-2507.
- What is Don Hammi's phone number?
- The practice phone number listed in the NPPES registry for Don Hammi is (619) 528-5000.
- Does Don Hammi accept Medicare?
- Don Hammi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Don Hammi's NPI active?
- Yes — Don Hammi's NPI (1235287269) is active in the NPPES registry as of the last update on 2011-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.