Michael Grossman, MD
NPI 1538158233 · Gastroenterology Physician · Enid, OK
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Grossman, MD is a Gastroenterology Physician provider in Enid, OK (NPI 1538158233).
Provider details
- NPI number
- 1538158233
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 10463 (OK)
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
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
12 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) |
|---|---|---|
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 12 | $114 |
Typical Medicare-allowed amounts for these services range $114–$114 (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 (1)
- 2 E Clark Bass BlvdSuite 301Mcalester, OK 74501-4282Phone: (918) 421-6846Fax: (918) 421-6875
Registry dates
- Enumerated
- 2005-10-17
- Last updated
- 2023-07-31
- Certified
- 2023-07-31
Frequently asked questions
- What is Michael Grossman's NPI number?
- Michael Grossman's National Provider Identifier (NPI) is 1538158233, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Grossman's specialty?
- Michael Grossman is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Grossman located?
- Michael Grossman's practice location on file with NPPES is 330 S 5th St, Enid, OK 73701-5825.
- What is Michael Grossman's phone number?
- The practice phone number listed in the NPPES registry for Michael Grossman is (580) 249-3003.
- Does Michael Grossman accept Medicare?
- Michael Grossman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Grossman's NPI active?
- Yes — Michael Grossman's NPI (1538158233) is active in the NPPES registry as of the last update on 2023-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.