Mark Lott, M.D.
NPI 1821192139 · Gastroenterology Physician · Inglewood, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Lott, M.D. is a Gastroenterology Physician provider in Inglewood, CA (NPI 1821192139).
Provider details
- NPI number
- 1821192139
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G85987 (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
1,281 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 369 | $77 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 169 | $117 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 156 | $170 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 124 | $171 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 112 | $48 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 140 | 139 |
| Famotidine | 114 | 40 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 104 | 101 |
| Omeprazole | 52 | 25 |
| Pantoprazole Sodium | 36 | 15 |
| Mesalaminebrand: Mesalamine Er | 30 | — |
| Dicyclomine Hcl | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$672 across 32 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
- 2006-09-08
- Last updated
- 2014-12-29
Frequently asked questions
- What is Mark Lott's NPI number?
- Mark Lott's National Provider Identifier (NPI) is 1821192139, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Lott's specialty?
- Mark Lott is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Lott located?
- Mark Lott's practice location on file with NPPES is 501 E Hardy St, Inglewood, CA 90301.
- What is Mark Lott's phone number?
- The practice phone number listed in the NPPES registry for Mark Lott is (310) 671-7010.
- Does Mark Lott accept Medicare?
- Mark Lott is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Lott's NPI active?
- Yes — Mark Lott's NPI (1821192139) is active in the NPPES registry as of the last update on 2014-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.