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DR. MAMDOOH GAYID MD
NPI 1477554988
Internal Medicine in Redlands, CA

Active since August 09, 2005PECOS EnrolledAccepts Medicare Assignment
242 CAJON ST, REDLANDS, CA 92373(909) 793-3311(909) 793-0241 Get Directions Write a Review

NPPES record last updated: December 15, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Mamdooh Gayid Md NPPES

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

DR. MAMDOOH GAYID MD (NPI 1477554988) is an individual internal medicine provider in Redlands, California, licensed in California (A85467) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Redlands, and is a graduate of Other (1982).

NPPES Registry Identity

NPI1477554988
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MAMDOOH GAYIDCredential: MD
Location Address242 CAJON STRedlands, CA 92373-5202
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(909) 793-3311
Fax(909) 793-0241
Sole ProprietorNo
Medical School CMSOtherGraduated 1982
Enumeration DateAugust 9, 2005
Last NPPES UpdateDecember 15, 2025
NPPES CertifiedDecember 15, 2025
✔ NPI 1477554988 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A85467✔ Licensed in NC · 200500328
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.
242 CAJON ST, Redlands, CA 92373
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Secondary Practice Location 1

Location 12 W Fern AveRedlands, CA 92373-5916 · Phone (909) 793-3311

Other Identifiers 1

Medicaid5900648NC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.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. Mamdooh Gayid 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 ID8628015377
PECOS Enrollment IDI20070221000360
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 Mamdooh Gayid reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Beaver Medical Group P C
0.7 mi
Family Medicine
2 WEST FERN AVENUE
Redlands, CA 92373
  • Reassigned Medicare billing, California enrollment
  • 635 clinicians in this Medicare group
NPI 1649503319 (909) 793-3311
Healthcare Partners Affiliates Medical Group
43 mi
Addiction Medicine
14591 NEWPORT AVE
Tustin, CA 92780
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1891981502 (714) 442-4864

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 3

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.

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.
78 services38 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
19 services14 patients
Assessment of emotional or behavioral problems 96127
Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.
15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92373 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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier11 claims11 services$69.17 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Mamdooh Gayid's NPI number?

The NPI number for Mamdooh Gayid is 1477554988. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

Where is Mamdooh Gayid located?

Mamdooh Gayid practices at 242 Cajon St, Redlands, CA 92373. The listed phone number is (909) 793-3311.

What is Mamdooh Gayid's specialty?

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

Is Mamdooh Gayid enrolled in Medicare?

Yes. Mamdooh Gayid 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 Mamdooh Gayid's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mamdooh Gayid reassigns Medicare benefits to 2 organizations: Beaver Medical Group P C (Redlands, CA) and Healthcare Partners Affiliates Medical Group (Tustin, 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 Mamdooh Gayid's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mamdooh Gayid accept?

Health plans from UnitedHealthcare list Mamdooh Gayid 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 Mamdooh Gayid was last updated on December 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.