Robert Grossberg, MD
NPI 1538259338 · Infectious Disease Physician · Bronx, NY
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Grossberg, MD is a Infectious Disease Physician provider in Bronx, NY (NPI 1538259338).
Provider details
- NPI number
- 1538259338
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 232074 (NY)
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
200 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 46 | $114 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 46 | $155 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 38 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 31 | $77 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 27 | $19 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 289 | 38 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 154 | 26 |
| Darunavir/Cob/Emtri/Tenof Alafbrand: Symtuza | 136 | 18 |
| Gabapentin | 113 | 18 |
| Atorvastatin Calcium | 107 | 27 |
| Dolutegravir Sodiumbrand: Tivicay | 97 | 11 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-13
- Last updated
- 2025-11-13
- Certified
- 2025-11-13
Frequently asked questions
- What is Robert Grossberg's NPI number?
- Robert Grossberg's National Provider Identifier (NPI) is 1538259338, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Grossberg's specialty?
- Robert Grossberg is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Grossberg located?
- Robert Grossberg's practice location on file with NPPES is Mmc - Dept. of Medicine, Bronx, NY 10467.
- What is Robert Grossberg's phone number?
- The practice phone number listed in the NPPES registry for Robert Grossberg is (718) 920-5224.
- Does Robert Grossberg accept Medicare?
- Robert Grossberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Grossberg's NPI active?
- Yes — Robert Grossberg's NPI (1538259338) is active in the NPPES registry as of the last update on 2025-11-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.