John Isaac, M.D.
NPI 1225037435 · Surgery Physician · Warwick, RI
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Isaac, M.D. is a Surgery Physician provider in Warwick, RI (NPI 1225037435).
Provider details
- NPI number
- 1225037435
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD07525 (RI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
13 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 13 | $125 |
Typical Medicare-allowed amounts for these services range $125–$125 (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.
Practice location
Mailing address
Additional practice locations (3)
- 168 Kinsley StNashua, NH 03060-3634Phone: (603) 598-0455Fax: (603) 598-0456
- 16000 Johnston Memorial Dr Ste 101Abingdon, VA 24211-7664Phone: (276) 258-1777
- 7554 Hospital Dr # D-303Gloucester, VA 23061-4178Phone: (804) 693-3400Fax: (804) 693-9793
Registry dates
- Enumerated
- 2005-07-19
- Last updated
- 2025-09-17
- Certified
- 2025-09-17
Frequently asked questions
- What is John Isaac's NPI number?
- John Isaac's National Provider Identifier (NPI) is 1225037435, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Isaac's specialty?
- John Isaac is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Isaac located?
- John Isaac's practice location on file with NPPES is 390 Toll Gate Rd, Warwick, RI 02886-4326.
- What is John Isaac's phone number?
- The practice phone number listed in the NPPES registry for John Isaac is (401) 739-8010.
- Does John Isaac accept Medicare?
- John Isaac is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Isaac's NPI active?
- Yes — John Isaac's NPI (1225037435) is active in the NPPES registry as of the last update on 2025-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.