Nicolas A. Melgarejo, M.D.
Infectious Disease Physician · San Antonio, TX
Nicolas A. Melgarejo, M.D. is an infectious disease physician with a practice address in San Antonio, Texas, and NPI 1386882520, issued on Jan 26, 2009. Check the license (Texas N1763, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Nicolas A. Melgarejo
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- N1763 TX
Self-reported in NPPES; status is on the state search - Practice location
- 343 W. Houston St., San Antonio, TX 78205
- Phone
- (210) 224-9616
- Enumerated
- Jan 26, 2009
- Record last updated
- Jun 28, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (210) 224-5822
- Medicaid ID
- 219315301 TX
- Medicare enrollment
- Enrolled (PECOS I20101202001147); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 674 in Texas → Look up another NPI →
Verify Nicolas A. Melgarejo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license N1763Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% fewer Medicare Part D claims than the average infectious disease physician in 2024
523 Medicare Part D claims for 76 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Biktarvy74 claims
- Doxycycline Monohydrate56 claims
- Amoxicillin49 claims
- Doxycycline Hyclate29 claims
- Prezcobix21 claims
- Tivicay21 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): 59.1 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: $676.44
30 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. The 3,895 providers of this specialty with any payment received $4,362.19 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
- San Antonio Infectious Diseases ConsultantsSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicolas A. Melgarejo among 674 infectious disease physician records in Texas
Nicolas A. Melgarejo, M.D. is one of 674 infectious disease physician records with a practice address in Texas. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2003 · median 2002 among the 510 with a school on file
- Record last updated2011 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Texas
There are 674 infectious disease physician records in Texas.
All 674 in Texas → Every provider in San Antonio → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Jason Bowling, M.D.San Antonio, TX 782071477573095
- Divya Chandramohan, MDSan Antonio, TX 782071467972208
- Manuel Camilo Endo Carvajal, MDSan Antonio, TX 782071346760956
- Heta Javeri, M.D.San Antonio, TX 782071457517088
- Maryem Lodhra, M.D.San Antonio, TX 782071457857708
- Sean O'Neil, M.D.San Antonio, TX 782071588985246
- Philip Ponce, MDSan Antonio, TX 782071649426123
- Ruth Serrano Pinilla, MDSan Antonio, TX 782071285073122
Common questions
What is Nicolas A. Melgarejo, M.D.'s NPI number?
Nicolas A. Melgarejo, M.D.'s National Provider Identifier (NPI) is 1386882520, issued on Jan 26, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Nicolas A. Melgarejo, M.D. located?
The NPPES record lists a practice address at 343 W. Houston St., San Antonio, TX, 78205. Phone: (210) 224-9616. Providers update this record themselves, so call before visiting.
How can I verify Nicolas A. Melgarejo, M.D.'s license?
NPPES lists Texas license number N1763, 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 Nicolas A. Melgarejo, M.D. prescribe under Medicare Part D?
In 2024, Nicolas A. Melgarejo, M.D. had 523 Medicare Part D claims for 76 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Nicolas A. Melgarejo, M.D.'s MIPS final score?
The 2023 MIPS final score is 59.1 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.