Charles A. Duncan, MD
Pulmonary Disease Physician · San Antonio, TX
Charles A. Duncan, MD is a pulmonary disease physician with a practice address in San Antonio, Texas, and NPI 1215932462, issued on Jun 15, 2005. Check the license (Texas H2115, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Charles A. Duncan
- Credential
- MD
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- H2115 TX
Self-reported in NPPES; status is on the state search - Practice location
- 10007 Huebner RD Ste 402, San Antonio, TX 78240
- Phone
- (210) 692-0361
- Enumerated
- Jun 15, 2005
- Record last updated
- Aug 12, 2025
- Fax
- (210) 692-0151
- Medicaid ID
- 120538705 TX
- Medicare enrollment
- Enrolled (PECOS I20050509000654); accepts Medicare assignment
- Medical or professional school
- Medical College Of Georgia School Of Medicine, 1977
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 10007 Huebner RD Ste 402
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marc Chalaby, M.D.Pulmonary Disease Physician1487648291
- Francisco Flores Guardado, MDPulmonary Disease Physician1598931263
- Monica Garcia Plaza, CNSAdult Health Clinical Nurse Specialist1992167779
- Gerardo Garza Gutierrez, M.D.Pulmonary Disease Physician1710901954
- Arturo Homma, MDPulmonary Disease Physician1306841556
- Paloma Sanchez, MDPulmonary Disease Physician1134507114
Verify Charles A. Duncan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H2115Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
1,331 Medicare Part D claims for 240 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Trelegy Ellipta428 claims
- Albuterol Sulfate Hfa244 claims
- Prednisone111 claims
- Montelukast Sodium80 claims
- Fluticasone-Salmeterol69 claims
- Doxycycline Hyclate44 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 82 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,972.44
93 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Pulmonary Consultants OF San Antonio PASan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pulmonary Disease Physician providers in Texas
There are 967 pulmonary disease physician records in Texas.
Other pulmonary disease physician records in Texas
- Olaedo Abana, MDWaco, TX1326544529
- Qammar Abbas, M.D.Wylie, TX1720359680
- Mohamed Abdalla, MDSan Antonio, TX1528413598
- Ali Abedi, M.D.San Antonio, TX1346566312
- Ricardo Abreu, MDWeslaco, TX1265469803
- Emran Abu Atherah, M.DWebster, TX1356570220
- Muhanned Abu-Hijleh, M.D.Texarkana, TX1730133190
- Sherif Abuserewa, MDLubbock, TX1801450630
- Bruce Ackerman, D.O.Garland, TX1932136785
- Mari Adachi, MDPlano, TX1104928340
Common questions
What is Charles A. Duncan, MD's NPI number?
Charles A. Duncan, MD's National Provider Identifier (NPI) is 1215932462, issued on Jun 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Charles A. Duncan, MD located?
The NPPES record lists a practice address at 10007 Huebner RD Ste 402, San Antonio, TX, 78240. Phone: (210) 692-0361. Providers update this record themselves, so call before visiting.
How can I verify Charles A. Duncan, MD's license?
NPPES lists Texas license number H2115, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Charles A. Duncan, MD prescribe under Medicare Part D?
In 2024, Charles A. Duncan, MD had 1,331 Medicare Part D claims for 240 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Charles A. Duncan, MD's MIPS final score?
The 2023 MIPS final score is 82 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.