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DR. AHMED MOHYELDIN MD
NPI 1912213687
Neurological Surgery in Orange, CA

Active since August 19, 2010PECOS EnrolledAccepts Medicare Assignment
101 THE CITY DR S BLDG 30, ORANGE, CA 92868(714) 456-6966 Get Directions Write a Review

NPPES record last updated: March 14, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Mar 14, 2023, Nov 8, 2021, Jul 10, 2019 and 1 more (4 updates tracked since 2018).

About Dr. Ahmed Mohyeldin Md NPPES

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

DR. AHMED MOHYELDIN MD (NPI 1912213687) is an individual neurological surgery provider in Orange, California, licensed in California (A159685) and active in the NPI registry since August 2010. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of George Washington University School Of Medicine (2011).

NPPES Registry Identity

NPI1912213687
Entity TypeIndividualMale
Primary Taxonomy207T00000X
Provider Legal NameDR. AHMED MOHYELDINCredential: MD
Location Address101 THE CITY DR S BLDG 30Orange, CA 92868-3201
Mailing Address200 S Manchester Ave Ste 300Orange, CA 92868-3219 · (714) 456-2986
Phone(714) 456-6966
Sole ProprietorNo
Medical School CMSGeorge Washington University School Of MedicineGraduated 2011
Enumeration DateAugust 19, 2010
Last NPPES UpdateMarch 14, 20234 updates tracked since enumeration
NPPES CertifiedMarch 14, 2023
✔ NPI 1912213687 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
Licenses✔ Licensed in CA · A159685✔ Licensed in OH · 57020192
Definition
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
101 THE CITY DR S BLDG 30, Orange, CA 92868
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1300 Pasteur DrStanford, CA 94305-2200 · Phone (650) 723-4000
Location 2410 West 10th Avenue, N1014 Doan HallColumbus, OH 43215 · Phone (614) 293-0821
Location 31165 Montgomery DrSanta Rosa, CA 95405-4801 · Phone (707) 546-3210

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Antidote Health Plan of Ohio, Inc..Insurance ›

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. Ahmed Mohyeldin Md 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 ID8527207372
PECOS Enrollment IDI20190219001722
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

2

Medicare enrollment records show Ahmed Mohyeldin reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Of The University Of California
Same address
Neurological Surgery
101 THE CITY DR S
Orange, CA 92868
  • Reassigned Medicare billing, California enrollment
  • 32 clinicians in this Medicare group
NPI 1659329746 (714) 456-8068
County Of Santa Clara
304 mi
Federally Qualified Health Center (FQHC)
7475 CAMINO ARROYO
Gilroy, CA 95020
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1629301346 (California), NPI 1588721500 (California)
  • 2,460 clinicians in this Medicare group
NPI 1922093533 (408) 885-5000

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 7

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.

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.
50 services32 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.
40 services20 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
33 services24 patients
Computer-assisted radiosurgery application of headframe 61800
Computer-assisted radiosurgery with a headframe is a non-invasive procedure that treats brain conditions. A headframe is attached to your head to keep it still during treatment. Using advanced computer technology, precise high-dose radiation beams target the affected area without harming healthy tissues.
26 services23 patients
Computer-assisted radiosurgery of complex growth of brain, first growth 61798
Computer-assisted radiosurgery is a non-invasive procedure used to treat abnormal growths in the brain. A computer helps direct highly focused beams of radiation at the growth, destroying it without harming nearby tissue. This is for the first identified growth.
18 services16 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.
16 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92868 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
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 9

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

DR. EKAMOL TANTISATTAMO MD
Internal Medicine (Nephrology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. MICHAEL Y OH MD
Neurological Surgery
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-6966
DR. IAN CHANG D.O.
Internal Medicine (Rheumatology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. ADITI THAKKAR MBBS
Internal Medicine (Endocrinology, Diabetes & Metabolism)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. IRENE TSAI M.D.
Radiology (Diagnostic Radiology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-2235
UTTAM G REDDY M.D.
Internal Medicine (Nephrology)
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720
DR. ISMAIL KASIMOGLU MD, PHD, MBA
Internal Medicine (Endocrinology, Diabetes & Metabolism)
101 THE CITY DR S BLDG 30, PAVILION 1, BLDG.30
ORANGE, CA 92868
Orange County (714) 456-7720
JULIA HSIU-LING LIANG NP
Nurse Practitioner
101 THE CITY DR S BLDG 30
ORANGE, CA 92868
Orange County (714) 456-7720

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 Ahmed Mohyeldin's NPI number?

The NPI number for Ahmed Mohyeldin is 1912213687. It was assigned to this individual provider in the NPPES registry on August 19, 2010.

Where is Ahmed Mohyeldin located?

Ahmed Mohyeldin practices at 101 The City Dr S Bldg 30, Orange, CA 92868. The listed phone number is (714) 456-6966.

What is Ahmed Mohyeldin's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Ahmed Mohyeldin enrolled in Medicare?

Yes. Ahmed Mohyeldin 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 Ahmed Mohyeldin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ahmed Mohyeldin reassigns Medicare benefits to 2 organizations: Regents Of The University Of California (Orange, CA) and County Of Santa Clara (Gilroy, 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 Ahmed Mohyeldin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ahmed Mohyeldin accept?

Health plans from Antidote Health Plan of Ohio, Inc. list Ahmed Mohyeldin as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Ahmed Mohyeldin was last updated on March 14, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.