Carmen J. Sierra, MD
Obstetrics Physician · Hato Rey, PR
Carmen J. Sierra, MD is an obstetrics physician with a practice address in Hato Rey, Puerto Rico, and NPI 1972539054, issued on Jun 23, 2006. Check the license (Puerto Rico 10976, as entered in NPPES) with the Puerto Rico board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Carmen J. Sierra
- Credential
- MD
- Primary taxonomy
- Obstetrics Physician 207VX0000X
- License number
- 10976 PR
Self-reported in NPPES; status is on the state search - Practice location
- Avenida Domenech 400, Hato Rey, PR 00919
- Phone
- (787) 281-8522
- Enumerated
- Jun 23, 2006
- Record last updated
- Feb 25, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (787) 751-0317
- Medicare enrollment
- Enrolled (PECOS I20090209000105); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics physician records → All 23 in Puerto Rico → Look up another NPI →
Verify Carmen J. Sierra in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Puerto Rico board licenses this profession
Search for license 10976Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% more Medicare Part D claims than the average obstetrics physician in 2024
248 Medicare Part D claims for 91 beneficiaries, against an average of 218 among the 863 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Fluconazole42 claims
- Clotrimazole-Betamethasone33 claims
- Spironolactone27 claims
- Progesterone17 claims
- Valacyclovir13 claims
- Acyclovir12 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.
Industry payments in 2024: $26.15
1 payment: food and beverage; the largest payer was Abbott Laboratories. The 679 providers of this specialty with any payment received $826.19 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.
Carmen J. Sierra among 23 obstetrics physician records in Puerto Rico
Carmen J. Sierra, MD is one of 23 obstetrics physician records with a practice address in Puerto Rico. 96% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 22% newer
- In a Medicare fileYes · 96% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1988 · median 1981 among the 14 with a school on file
- Record last updated2009 · 78% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0000X and a Puerto Rico practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics Physician providers in Puerto Rico
There are 23 obstetrics physician records in Puerto Rico.
All 23 in Puerto Rico → Every provider in Hato Rey → Obstetrics Physician nationwide →
The 8 obstetrics physician records with the nearest ZIP codes
- Hiram Malaret, M.D.San Juan, PR 009171336222819
- Yurizam Ramirez OjedaSan Juan, PR 009171780877092
- Adrian Colon LaracuenteSan Juan, PR 009251174629034
- Jesus Velez-Feliciano, M.D.San Juan, PR 009251770685026
- Jose AlvarezSan Juan, PR 009071336238344
- Edwin Baez Montalvo, MDBayamon, PR 009591194794255
- Hazel Cruz PerezBayamon, PR 009601922660463
- Eduardo Torres, M.D.Bayamon, PR 009601457329252
Common questions
What is Carmen J. Sierra, MD's NPI number?
Carmen J. Sierra, MD's National Provider Identifier (NPI) is 1972539054, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carmen J. Sierra, MD located?
The NPPES record lists a practice address at Avenida Domenech 400, Hato Rey, PR, 00919. Phone: (787) 281-8522. Providers update this record themselves, so call before visiting.
How can I verify Carmen J. Sierra, MD's license?
NPPES lists Puerto Rico license number 10976, as entered by the provider. Search the Puerto Rico board that licenses this profession; the NPPES record confirms identity only.
How much does Carmen J. Sierra, MD prescribe under Medicare Part D?
In 2024, Carmen J. Sierra, MD had 248 Medicare Part D claims for 91 beneficiaries; the average among obstetrics physician prescribers was 218. Part D covers Medicare prescriptions only.
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.