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DR. MAHMOUD YOUSSEF ABDALLAH DO
NPI 1871014027
Internal Medicine - Pulmonary Disease in Garden Grove, CA

Active since June 28, 2017PECOS EnrolledAccepts Medicare Assignment
12462 BROOKHURST ST STE A&B, GARDEN GROVE, CA 92840(714) 636-9850 Get Directions Write a Review

NPPES record last updated: September 8, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 8, 2023, Apr 3, 2020, Jun 28, 2017 (3 updates tracked since 2017).

About Dr. Mahmoud Youssef Abdallah Do NPPES

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

DR. MAHMOUD YOUSSEF ABDALLAH DO (NPI 1871014027) is an individual pulmonary disease provider in Garden Grove, California, licensed in California (20A16964) and active in the NPI registry since June 2017. He is enrolled in Medicare PECOS and is a graduate of Other (2017).

NPPES Registry Identity

NPI1871014027
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameDR. MAHMOUD YOUSSEF ABDALLAHCredential: DO
Location Address12462 BROOKHURST ST STE A&BGarden Grove, CA 92840-4759
Mailing Address3033 W Orange AveAnaheim, CA 92804-3156
Phone(714) 636-9850
Sole ProprietorYes
Medical School CMSOtherGraduated 2017
Enumeration DateJune 28, 2017
Last NPPES UpdateSeptember 8, 20233 updates tracked since enumeration
NPPES CertifiedSeptember 8, 2023
✔ NPI 1871014027 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in CA · 20A16964
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal MedicineTaxonomy 207R00000X · License 20A16964 (CA)
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 20A16964 (CA)
12462 BROOKHURST ST STE A&B, Garden Grove, CA 92840
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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. Mahmoud Youssef Abdallah Do 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 ID7214399302
PECOS Enrollment IDI20231004004144
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 Reassignment

Medicare enrollment records show Mahmoud Abdallah reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Pathway Medical Group, Inc
Same address
Family Medicine
12462 BROOKHURST ST, #A&B
Garden Grove, CA 92840
  • Reassigned Medicare billing, California enrollment
  • 24 clinicians in this Medicare group
NPI 1407802069 (714) 636-9850

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 6

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.
816 services226 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.
536 services187 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.
72 services70 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.
63 services32 patients
Emergent insertion of breathing tube into windpipe using an endoscope 31500
This is a procedure where a thin tube is inserted into your windpipe to aid in breathing. It's done in emergency situations, using an endoscope, a tool with a light and camera, to ensure correct placement.
36 services34 patients
Insertion of non-tunneled central venous tube for infusion (5 years or older) 36556
This procedure involves placing a thin tube into a large vein, usually in the neck or chest, to administer medication or fluids. It's done under local anesthesia to minimize discomfort. It's a standard, safe procedure for individuals aged 5 and above.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92840 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
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

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 Mahmoud Abdallah's NPI number?

The NPI number for Mahmoud Abdallah is 1871014027. It was assigned to this individual provider in the NPPES registry on June 28, 2017.

Where is Mahmoud Abdallah located?

Mahmoud Abdallah practices at 12462 Brookhurst St Ste A&b, Garden Grove, CA 92840. The listed phone number is (714) 636-9850.

What is Mahmoud Abdallah's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Mahmoud Abdallah enrolled in Medicare?

Yes. Mahmoud Abdallah 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 organization bills Medicare for Mahmoud Abdallah's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mahmoud Abdallah reassigns Medicare benefits to Pathway Medical Group, Inc (Garden Grove, CA). The 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 Mahmoud Abdallah'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 Mahmoud Abdallah was last updated on September 8, 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.