Michael Loudin, M.D.
NPI 1932542156 · Gastroenterology Physician · Berkeley, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Loudin, M.D. is a Gastroenterology Physician provider in Berkeley, CA (NPI 1932542156).
Provider details
- NPI number
- 1932542156
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A159541 (CA)
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
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
644 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 103 | $154 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 69 | $76 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 62 | $144 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 62 | $88 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 61 | $268 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 79 | 32 |
| Pantoprazole Sodium | 51 | 20 |
| Famotidine | 50 | 18 |
| Nortriptyline Hcl | 31 | — |
| Spironolactone | 31 | — |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 29 | 27 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 29 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,221 across 65 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
Additional practice locations (2)
- 2700 Grant St Ste 310Concord, CA 94520-2279Phone: (925) 687-9650
- 1479 Ygnacio Valley Rd # 150Walnut Creek, CA 94598-2986Phone: (925) 296-7340
Registry dates
- Enumerated
- 2013-04-08
- Last updated
- 2023-03-07
- Certified
- 2022-10-26
Frequently asked questions
- What is Michael Loudin's NPI number?
- Michael Loudin's National Provider Identifier (NPI) is 1932542156, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Loudin's specialty?
- Michael Loudin is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Loudin located?
- Michael Loudin's practice location on file with NPPES is 3100 San Pablo Ave # 420, Berkeley, CA 94702-2498.
- What is Michael Loudin's phone number?
- The practice phone number listed in the NPPES registry for Michael Loudin is (510) 985-5020.
- Does Michael Loudin accept Medicare?
- Michael Loudin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Loudin's NPI active?
- Yes — Michael Loudin's NPI (1932542156) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.