Keith Obstein, MD, MPH
NPI 1528122595 · Gastroenterology Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Keith Obstein, MD, MPH is a Gastroenterology Physician provider in Nashville, TN (NPI 1528122595).
Provider details
- NPI number
- 1528122595
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MPH
- Sex
- Male
- Sole proprietor
- No
- License
- 231927 (MA)
Specialties & taxonomies
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
175 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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 62 | $209 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 39 | $65 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 32 | $76 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 27 | $117 |
| Insertion of Guide Wire With Dilation of Esophagus Using a Flexible Endoscope43248 | 15 | $132 |
Typical Medicare-allowed amounts for these services range $65–$209 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 79 | 77 |
| Omeprazole | 65 | 18 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 43 | 42 |
| Pantoprazole Sodium | 29 | — |
| Esomeprazole Magnesium | 14 | — |
| Linaclotidebrand: Linzess | 13 | — |
| Dicyclomine Hcl | 11 |
Practice location
Mailing address
Additional practice locations (2)
- 1310 24th Ave SNashville, TN 37212-2637Phone: (615) 327-4751
- 1301 Medical Center DrSuite 1660 TvcNashville, TN 37232-5280Phone: (615) 322-0128Fax: (615) 343-8174
Registry dates
- Enumerated
- 2006-12-21
- Last updated
- 2022-03-26
- Certified
- 2022-03-26
Frequently asked questions
- What is Keith Obstein's NPI number?
- Keith Obstein's National Provider Identifier (NPI) is 1528122595, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Keith Obstein's specialty?
- Keith Obstein is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Keith Obstein located?
- Keith Obstein's practice location on file with NPPES is 3601 the Vanderbilt Clinic, Nashville, TN 37232-5280.
- What is Keith Obstein's phone number?
- The practice phone number listed in the NPPES registry for Keith Obstein is (615) 936-2000.
- Does Keith Obstein accept Medicare?
- Keith Obstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Keith Obstein's NPI active?
- Yes — Keith Obstein's NPI (1528122595) is active in the NPPES registry as of the last update on 2022-03-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.