William Alexander, M.D.
NPI 1609848738 · Gastroenterology Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Alexander, M.D. is a Gastroenterology Physician provider in Nashville, TN (NPI 1609848738).
Provider details
- NPI number
- 1609848738
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD0000018809 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
465 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 95 | $52 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 65 | $83 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 61 | $79 |
| Insertion of Guide Wire With Dilation of Esophagus Using a Flexible Endoscope43248 | 47 | $124 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 39 | $102 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoclopramide Hcl | 395 | 155 |
| Pantoprazole Sodium | 246 | 53 |
| Famotidine | 223 | 54 |
| Dicyclomine Hcl | 106 | 28 |
| Linaclotidebrand: Linzess | 75 | 14 |
| Omeprazole | 70 | 16 |
| Sucralfate | 58 | 22 |
| Alprazolam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$347 across 11 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-02-02
- Last updated
- 2021-04-12
- Certified
- 2021-04-12
Frequently asked questions
- What is William Alexander's NPI number?
- William Alexander's National Provider Identifier (NPI) is 1609848738, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Alexander's specialty?
- William Alexander is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Alexander located?
- William Alexander's practice location on file with NPPES is 343 22nd Ave N, Nashville, TN 37203-1841.
- What is William Alexander's phone number?
- The practice phone number listed in the NPPES registry for William Alexander is (615) 327-7835.
- Does William Alexander accept Medicare?
- William Alexander is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Alexander's NPI active?
- Yes — William Alexander's NPI (1609848738) is active in the NPPES registry as of the last update on 2021-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.