Nicholas Grumbach, M.D.
NPI 1932105780 · Internal Medicine Physician · Warwick, RI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Grumbach, M.D. is a Internal Medicine Physician provider in Warwick, RI (NPI 1932105780).
Provider details
- NPI number
- 1932105780
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD10410 (RI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Amlodipine Besylate | 19 |
| Tamsulosin Hcl | 19 |
| Atorvastatin Calcium | 16 |
| Metformin Hcl | 16 |
| Pantoprazole Sodium | 15 |
| Mirtazapine | 15 |
| Sertraline Hcl | 14 |
| Gabapentin | 14 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-27
- Last updated
- 2015-09-30
Frequently asked questions
- What is Nicholas Grumbach's NPI number?
- Nicholas Grumbach's National Provider Identifier (NPI) is 1932105780, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Grumbach's specialty?
- Nicholas Grumbach is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Grumbach located?
- Nicholas Grumbach's practice location on file with NPPES is 400 Bald Hill Rd, Warwick, RI 02886-1617.
- What is Nicholas Grumbach's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Grumbach is (401) 793-8520.
- Does Nicholas Grumbach accept Medicare?
- Nicholas Grumbach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Grumbach's NPI active?
- Yes — Nicholas Grumbach's NPI (1932105780) is active in the NPPES registry as of the last update on 2015-09-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.