Robert Zimmerman, M.D.
NPI 1619294352 · Infectious Disease Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Zimmerman, M.D. is a Infectious Disease Physician provider in Sacramento, CA (NPI 1619294352).
Provider details
- NPI number
- 1619294352
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A118958 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 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
1,078 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 397 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 286 | $125 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 261 | $138 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 103 | $141 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 20 | $184 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Ceftriaxone Sodiumbrand: Ceftriaxone | 42 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 36 |
| Azithromycin | 31 |
| Rifampin | 28 |
| Vancomycin Hcl | 28 |
| Abacavir/Dolutegravir/Lamivudibrand: Triumeq | 25 |
| Cefazolin Sodium | 21 |
| Emtricitabine/Tenofovir (tdf)brand: Emtricitabine-Tenofovir Disop | 21 |
| Ethambutol Hcl | 21 |
| Elviteg/Cob/Emtri/Tenof Alafen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$471 across 19 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
- 2010-04-20
- Last updated
- 2015-10-14
Frequently asked questions
- What is Robert Zimmerman's NPI number?
- Robert Zimmerman's National Provider Identifier (NPI) is 1619294352, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Zimmerman's specialty?
- Robert Zimmerman is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Zimmerman located?
- Robert Zimmerman's practice location on file with NPPES is 3000 Q Street, Sacramento, CA 95816.
- What is Robert Zimmerman's phone number?
- The practice phone number listed in the NPPES registry for Robert Zimmerman is (916) 733-3401.
- Does Robert Zimmerman accept Medicare?
- Robert Zimmerman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Zimmerman's NPI active?
- Yes — Robert Zimmerman's NPI (1619294352) is active in the NPPES registry as of the last update on 2015-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.