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DR. MEHRDAD GHAHREMANI-GHAJAR D.O.
NPI 1942510607
Internal Medicine in Rialto, CA

Active since October 15, 2010PECOS EnrolledAccepts Medicare Assignment
2248 N MILOR AVE, RIALTO, CA 92377(909) 472-8375 Get Directions Write a Review

NPPES record last updated: May 19, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: May 19, 2026, Nov 22, 2021 (2 updates tracked since 2021).

About Dr. Mehrdad Ghahremani-ghajar D.o. NPPES

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

DR. MEHRDAD GHAHREMANI-GHAJAR D.O. (NPI 1942510607) is an individual internal medicine provider in Rialto, California, licensed in California (20A11526) and active in the NPI registry since October 2010. He is enrolled in Medicare PECOS and is a graduate of Other (2009).

NPPES Registry Identity

NPI1942510607
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MEHRDAD GHAHREMANI-GHAJARCredential: D.O.
Location Address2248 N MILOR AVERialto, CA 92377-4675
Mailing Address2248 N Milor AveRialto, CA 92377-4675
Phone(909) 472-8375
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateOctober 15, 2010
Last NPPES UpdateMay 19, 20262 updates tracked since enumeration
NPPES CertifiedMay 19, 2026
✔ NPI 1942510607 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 CA · 20A11526
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 ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
2248 N MILOR AVE, Rialto, CA 92377
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mehrdad Ghahremani-ghajar D.o. 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 ID3072761337
PECOS Enrollment IDI20120912000402
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.

Medicare Billing Reassignments

5

Medicare enrollment records show Mehrdad Ghahremani-ghajar reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Quantum Healthcare Medical Associates Inc.
4.9 mi
Hospitalist
400 N PEPPER AVE
Colton, CA 92324
  • Reassigned Medicare billing, California enrollment
  • 338 clinicians in this Medicare group
NPI 1568490597 (909) 580-1000
Inland Empire Nephrology, Inc.
4.9 mi
Nephrology
400 N PEPPER AVE
Colton, CA 92324
  • Reassigned Medicare billing, California enrollment
  • 12 clinicians in this Medicare group
NPI 1376061572 (909) 835-7946
Southern California Permanente Medical Group
5.3 mi
Health Maintenance Organization
15272 SUMMIT AVE
Fontana, CA 92336
  • Reassigned Medicare billing, California enrollment
  • 5,228 clinicians in this Medicare group
NPI 1316463763 (877) 608-0044
Carvajal & Alquiroz Mobile Professionals Inc- A Professional N
50 mi
Nurse Practitioner
121 W LEXINGTON DR STE 303B
Glendale, CA 91203
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1164159364 (818) 671-0012
Clinic Services Of California Medical Group Inc
351 mi
Emergency Medicine
1235 W VINE ST, SUITE 20
Lodi, CA 95240
  • Reassigned Medicare billing, California enrollment
  • 148 clinicians in this Medicare group
NPI 1578958450 (925) 924-1600

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 9

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 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.
532 services169 patients
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.
270 services112 patients
Hemodialysis procedure with physician evaluation 90935
Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
253 services79 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
219 services31 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.
214 services197 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
32 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92377 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
99%155 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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 Mehrdad Ghahremani-ghajar's NPI number?

The NPI number for Mehrdad Ghahremani-ghajar is 1942510607. It was assigned to this individual provider in the NPPES registry on October 15, 2010.

Where is Mehrdad Ghahremani-ghajar located?

Mehrdad Ghahremani-ghajar practices at 2248 N Milor Ave, Rialto, CA 92377. The listed phone number is (909) 472-8375.

What is Mehrdad Ghahremani-ghajar's specialty?

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

Is Mehrdad Ghahremani-ghajar enrolled in Medicare?

Yes. Mehrdad Ghahremani-ghajar 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.

Which organizations bill Medicare for Mehrdad Ghahremani-ghajar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mehrdad Ghahremani-ghajar reassigns Medicare benefits to 5 organizations: Quantum Healthcare Medical Associates Inc. (Colton, CA), Inland Empire Nephrology, Inc. (Colton, CA), Southern California Permanente Medical Group (Fontana, CA), Carvajal & Alquiroz Mobile Professionals Inc- A Professional N (Glendale, CA) and Clinic Services Of California Medical Group Inc (Lodi, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mehrdad Ghahremani-ghajar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mehrdad Ghahremani-ghajar was last updated on May 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.