Carlos Humberto Mazariegos Letran, M.D.
Internal Medicine Physician · Bakersfield, CA
Carlos Humberto Mazariegos Letran, M.D. is an internal medicine physician with a practice address in Bakersfield, California, and NPI 1477176899, issued on May 20, 2020. Check the license (California A187387, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carlos Humberto Mazariegos Letran
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A187387 CA
125.077178 IL
Self-reported in NPPES; status is on the state search - Practice location
- 2615 Chester Ave, Bakersfield, CA 93301
- Phone
- (661) 395-3000
- Enumerated
- May 20, 2020
- Record last updated
- Nov 25, 2025
- Medicare enrollment
- Enrolled (PECOS I20230928002718); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2615 Chester Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jenny Agyeman, CRNACertified Registered Nurse Anesthetist1538589106
- Wafa AhmedPhysician Assistant1194376152
- Christopher Alix, AGACNP-BC, FNP-BCNurse Practitioner1093220998
- Brittany Ambrose, DOEmergency Medicine Physician1205530664
- Arabella Ancheta, ACNP-BCAcute Care Nurse Practitioner1588011357
- Lindsey Anspach, L-305882Lactation Consultant (Registered Nurse)1740920040
Verify Carlos Humberto Mazariegos Letran in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A187387Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average internal medicine physician in 2024
215 Medicare Part D claims for 102 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 12 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass15 claims
- Levofloxacin15 claims
- Pantoprazole Sodium15 claims
- Amlodipine Besylate11 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: $175.00
6 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). The 50,334 providers of this specialty with any payment received $1,303.06 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
- Galen Inpatient Physicians PCHanford, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carlos Humberto Mazariegos Letran among 17,696 internal medicine physician records in California
Carlos Humberto Mazariegos Letran, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2017 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
214 internal medicine physician records list a practice address in Bakersfield
They are 214 of the 11,539 NPPES records with a practice address in Bakersfield, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Bakersfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jennifer Abraham, MDBakersfield, CA 933011285650259
- Pritam Badesha, MDBakersfield, CA 933011972532679
- Rosie Boparai, MDBakersfield, CA 933011740226398
- Kevork Bouldoukian, M.D.Bakersfield, CA 933011720020464
- Chung- Kwang Chen, MDBakersfield, CA 933011083610273
- David Dougherty, M.D.Bakersfield, CA 933011205858917
- Jeffery Freesemann, MDBakersfield, CA 933011336156488
- Fakhruddin Hasta, M.D.Bakersfield, CA 933011316974694
Common questions
What is Carlos Humberto Mazariegos Letran, M.D.'s NPI number?
Carlos Humberto Mazariegos Letran, M.D.'s National Provider Identifier (NPI) is 1477176899, issued on May 20, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Carlos Humberto Mazariegos Letran, M.D. located?
The NPPES record lists a practice address at 2615 Chester Ave, Bakersfield, CA, 93301. Phone: (661) 395-3000. Providers update this record themselves, so call before visiting.
How can I verify Carlos Humberto Mazariegos Letran, M.D.'s license?
NPPES lists California license number A187387, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Carlos Humberto Mazariegos Letran, M.D. prescribe under Medicare Part D?
In 2024, Carlos Humberto Mazariegos Letran, M.D. had 215 Medicare Part D claims for 102 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.