David Marks, M.D.
NPI 1821016023 · Pulmonary Disease Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Marks, M.D. is a Pulmonary Disease Physician provider in San Antonio, TX (NPI 1821016023).
Provider details
- NPI number
- 1821016023
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- L6513 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
4,468 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 | 726 | $121 |
| Telephone Or Internet Assessment With Verbal and Written Report By Consulting Physician, 21-30 Minutes99448 | 641 | $51 |
| Residence Visit for Established Patient With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99349 | 479 | $121 |
| Test to Examine How Well the Lungs Exchange Gases94729 | 395 | $53 |
| Test to Determine Lung Volumes Using Sensors94726 | 393 | $51 |
| Telephone Or Internet Assessment With Verbal and Written Report By Consulting Physician, More Than 30 Minutes99449 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 93 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 338 | 84 |
| Montelukast Sodium | 254 | 82 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 205 | 89 |
| Prednisone | 156 | 74 |
| Budesonide/Glycopyr/Formoterolbrand: Breztri Aerosphere | 142 | 41 |
| Azithromycin | 134 | 93 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$163,954 across 272 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
- 2006-07-17
- Last updated
- 2026-05-14
- Certified
- 2026-05-14
Frequently asked questions
- What is David Marks's NPI number?
- David Marks's National Provider Identifier (NPI) is 1821016023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Marks's specialty?
- David Marks is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is David Marks located?
- David Marks's practice location on file with NPPES is 115 Gallery Cir, San Antonio, TX 78258-3388.
- What is David Marks's phone number?
- The practice phone number listed in the NPPES registry for David Marks is (210) 494-4220.
- Does David Marks accept Medicare?
- David Marks is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Marks's NPI active?
- Yes — David Marks's NPI (1821016023) is active in the NPPES registry as of the last update on 2026-05-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.