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DR. CARLOS HUMBERTO MAZARIEGOS LETRAN M.D.
NPI 1477176899
Internal Medicine in Bakersfield, CA

Active since May 20, 2020PECOS EnrolledAccepts Medicare Assignment
2615 CHESTER AVE, BAKERSFIELD, CA 93301(661) 395-3000 Get Directions Write a Review

NPPES record last updated: November 25, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Nov 25, 2025, Mar 6, 2024, Jun 20, 2023 and 2 more (5 updates tracked since 2020).

About Dr. Carlos Humberto Mazariegos Letran M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CARLOS HUMBERTO MAZARIEGOS LETRAN M.D. (NPI 1477176899) is an individual internal medicine provider in Bakersfield, California, licensed in Illinois (125.077178) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1477176899
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. CARLOS HUMBERTO MAZARIEGOS LETRANCredential: M.D.
Location Address2615 CHESTER AVEBakersfield, CA 93301-2014
Mailing Address2615 Chester AveBakersfield, CA 93301-2014 · (661) 395-3000
Phone(661) 395-3000
Sole ProprietorNo
Medical School CMSOtherGraduated 2017
Enumeration DateMay 20, 2020
Last NPPES UpdateNovember 25, 20255 updates tracked since enumeration
NPPES CertifiedNovember 25, 2025
✔ NPI 1477176899 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 125.077178
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedHospitalistTaxonomy 208M00000X · License A187387 (CA)
2615 CHESTER AVE, Bakersfield, CA 93301
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Carlos Humberto Mazariegos Letran M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3274987946
PECOS Enrollment IDI20230928002718
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
425 services179 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
156 services153 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
132 services127 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
68 services39 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
39 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$135.05 typical visit price
range $59.26 – $178.09
Typical copayment $33.76 (range $14.81 – $44.52)
Most-billed visit code 99204
Established Patient
$104.09 typical visit price
range $19.34 – $145.64
Typical copayment $26.02 (range $4.83 – $36.41)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TAYLOR DIANE FIERRO
Nurse Practitioner
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 654-2505
JOHN PHILLIP DICKEY M.D.
Internal Medicine
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 869-6931
SOUND INPATIENT PHYSICIANS MEDICAL GROUP, INC
Hospitalist
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 935-3000
MS. MARIA JOY VINLUAN-FELIX P.A.
Physician Assistant (Surgical)
2615 CHESTER AVE, SURGERY DEPARTMENT
BAKERSFIELD, CA 93301
Kern County (661) 395-3000
GURKANWAL KLER
Pharmacist
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 863-3280
COMFORT ANESTHESIA ASSOCIATES INC
Anesthesiology
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 395-3000
MR. MARK ELIEFF PTA, MSA
Physical Therapy Assistant
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 395-3000
DR. STEVEN HENRY DZIERBA PHARMD MS FASHP
Pharmacist (Pharmacotherapy)
2615 CHESTER AVE
BAKERSFIELD, CA 93301
Kern County (661) 869-6280

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Carlos Mazariegos Letran's NPI number?

The NPI number for Carlos Mazariegos Letran is 1477176899. It was assigned to this individual provider in the NPPES registry on May 20, 2020.

Where is Carlos Mazariegos Letran located?

Carlos Mazariegos Letran practices at 2615 Chester Ave, Bakersfield, CA 93301. The listed phone number is (661) 395-3000.

What is Carlos Mazariegos Letran's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Carlos Mazariegos Letran enrolled in Medicare?

Yes. Carlos Mazariegos Letran is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Carlos Mazariegos Letran was last updated on November 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.