Lenna Martyak, M.D.
NPI 1164638177 · Gastroenterology Physician · Santa Monica, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lenna Martyak, M.D. is a Gastroenterology Physician provider in Santa Monica, CA (NPI 1164638177).
Provider details
- NPI number
- 1164638177
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- A87515 (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
19 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
1,357 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 | 411 | $138 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 176 | $138 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 159 | $94 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 151 | $81 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 85 | $245 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 334 | 115 |
| Famotidine | 256 | 85 |
| Omeprazole | 93 | 36 |
| Linaclotidebrand: Linzess | 74 | 18 |
| Ondansetronbrand: Ondansetron Odt | 44 | 20 |
| Sucralfate | 42 | 19 |
| Dicyclomine Hcl | 34 | 21 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,168 across 87 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
- 2007-05-15
- Last updated
- 2021-09-14
- Certified
- 2021-09-14
Frequently asked questions
- What is Lenna Martyak's NPI number?
- Lenna Martyak's National Provider Identifier (NPI) is 1164638177, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lenna Martyak's specialty?
- Lenna Martyak is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Lenna Martyak located?
- Lenna Martyak's practice location on file with NPPES is 1301 20th St Ste 280, Santa Monica, CA 90404-2053.
- What is Lenna Martyak's phone number?
- The practice phone number listed in the NPPES registry for Lenna Martyak is (310) 829-6789.
- Does Lenna Martyak accept Medicare?
- Lenna Martyak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lenna Martyak's NPI active?
- Yes — Lenna Martyak's NPI (1164638177) is active in the NPPES registry as of the last update on 2021-09-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.