Mark Lin, MD
NPI 1366594749 · Gastroenterology Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Lin, MD is a Gastroenterology Physician provider in Tucson, AZ (NPI 1366594749).
Provider details
- NPI number
- 1366594749
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2008024820 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,525 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 | 232 | $126 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 202 | $99 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 195 | $243 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 134 | $164 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 119 | $90 |
| Biopsy 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 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 303 | 99 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 211 | 208 |
| Pantoprazole Sodium | 207 | 62 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 145 | 140 |
| Adalimumabbrand: Humira(cf) Pen | 52 | — |
| Budesonidebrand: Budesonide Dr | 44 | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$487 across 28 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 (1)
- 1521 E Tangerine Rd Ste 123Oro Valley, AZ 85755-6214Phone: (520) 901-6336
Registry dates
- Enumerated
- 2007-01-17
- Last updated
- 2025-08-19
- Certified
- 2025-08-19
Frequently asked questions
- What is Mark Lin's NPI number?
- Mark Lin's National Provider Identifier (NPI) is 1366594749, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Lin's specialty?
- Mark Lin is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Lin located?
- Mark Lin's practice location on file with NPPES is 1396 N Wilmot Rd, Tucson, AZ 85712-5132.
- What is Mark Lin's phone number?
- The practice phone number listed in the NPPES registry for Mark Lin is (520) 420-2250.
- Does Mark Lin accept Medicare?
- Mark Lin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Lin's NPI active?
- Yes — Mark Lin's NPI (1366594749) is active in the NPPES registry as of the last update on 2025-08-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.