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DR. HOMAYOON MAHJOOB M.D.
NPI 1740494178
Internal Medicine - Gastroenterology in Glenn Dale, MD

Active since May 08, 2007PECOS EnrolledAccepts Medicare Assignment
12150 ANNAPOLIS RD STE 312, GLENN DALE, MD 20769(301) 352-7771 Get Directions Write a Review

NPPES record last updated: October 9, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 9, 2025, Feb 19, 2025 (2 updates tracked since 2025).

About Dr. Homayoon Mahjoob M.d. NPPES

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

DR. HOMAYOON MAHJOOB M.D. (NPI 1740494178) is an individual gastroenterology provider in Glenn Dale, Maryland, licensed in Massachusetts (236692) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with University Of Md Capital Region Medical Center, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1740494178
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. HOMAYOON MAHJOOBCredential: M.D.
Location Address12150 ANNAPOLIS RD STE 312Glenn Dale, MD 20769-9183
Mailing Address12150 Annapolis Rd Ste 312Glenn Dale, MD 20769-9183 · (301) 352-7771
Phone(301) 352-7771
Sole ProprietorNo
Medical School CMSOtherGraduated 1991
Enumeration DateMay 8, 2007
Last NPPES UpdateOctober 9, 20252 updates tracked since enumeration
NPPES CertifiedOctober 9, 2025
✔ NPI 1740494178 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in MA · 236692✔ Licensed in MI · EMC0005932✔ Licensed in DE · C1-0028553
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
12150 ANNAPOLIS RD STE 312, Glenn Dale, MD 20769
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Secondary Practice Locations 3

Location 118947 John J Williams HwyRehoboth Beach, DE 19971-4474 · Phone (302) 645-9325 · Fax (302) 644-7162
Location 2424 Savannah RdLewes, DE 19958-1462 · Phone (302) 645-9325 · Fax (302) 644-7162
Location 333663 Bayview Medical Dr Unit 2Lewes, DE 19958-1663 · Phone (302) 645-9325 · Fax (302) 644-7162

Other Identifiers 2

OtherEMC0005932MI · Medical License
OtherD0058186MD · Medical License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan, Ambetter Health and more.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. Homayoon Mahjoob 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 ID6103919741
PECOS Enrollment IDI20070914000510, I20251023004596
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 Homayoon Mahjoob reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Greenbelt Endoscopy Center,llc
2.8 mi
Endoscopy
9821 GREENBELT RD, SUITE 103
Lanham, MD 20706
  • Reassigned Medicare billing, District of Columbia enrollment
  • 13 clinicians in this Medicare group
NPI 1538116439 (301) 552-1801
Advanced Gi Associates LLC
18 mi
Gastroenterology
10846 ANTIGUA TER, #203
North Bethesda, MD 20852
  • Reassigned Medicare billing, District of Columbia enrollment
NPI 1770810038 (301) 770-5711
Inova Health Care Services
24 mi
Medical Oncology
8081 INNOVATION PARK DR
Fairfax, VA 22031
  • Reassigned Medicare billing, District of Columbia and Virginia enrollments
  • Also billed through NPI 1952320061 (District of Columbia), NPI 1588717755 (Virginia)
  • 258 clinicians in this Medicare group
NPI 1275097123 (703) 289-2454
Beebe Physician Network, Inc.
89 mi
Internal Medicine
1515 SAVANNAH RD
Lewes, DE 19958
  • Reassigned Medicare billing, Delaware enrollment
  • 382 clinicians in this Medicare group
NPI 1730133992 (302) 313-2300
Ascension Medical Group Promed
494 mi
Pediatrics
1555 E CHICAGO RD
Sturgis, MI 49091
  • Reassigned Medicare billing, Michigan enrollment
  • 465 clinicians in this Medicare group
NPI 1013926997 (269) 651-7114

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 10

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.
501 services158 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.
213 services204 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.
146 services97 patients
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235
This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.
39 services36 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
36 services35 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
36 services36 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Of MD Capital Region Medical Center

Acute Care Hospitals · Upper Marlboro, MD
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210003
Location901 North Harry S Truman DriveUpper Marlboro, MD 20774 · Prince Georges County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20769 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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

Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
19%188 patients1/55-star benchmark: 85%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
98%530 patients4/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
98%239 patients4/55-star benchmark: 100%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
16%365 patients1/55-star benchmark: 97%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
63%366 patients3/55-star benchmark: 100%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 0% · 57 patients
0%57 patients5/55-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 Homayoon Mahjoob's NPI number?

The NPI number for Homayoon Mahjoob is 1740494178. It was assigned to this individual provider in the NPPES registry on May 8, 2007.

Where is Homayoon Mahjoob located?

Homayoon Mahjoob practices at 12150 Annapolis Rd Ste 312, Glenn Dale, MD 20769. The listed phone number is (301) 352-7771.

What is Homayoon Mahjoob's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Homayoon Mahjoob enrolled in Medicare?

Yes. Homayoon Mahjoob 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 Homayoon Mahjoob's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Homayoon Mahjoob reassigns Medicare benefits to 5 organizations: Greenbelt Endoscopy Center,llc (Lanham, MD), Advanced Gi Associates LLC (North Bethesda, MD), Inova Health Care Services (Fairfax, VA), Beebe Physician Network, Inc. (Lewes, DE) and Ascension Medical Group Promed (Sturgis, MI). 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 Homayoon Mahjoob's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Homayoon Mahjoob accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and AmeriHealth Caritas Next and 4 other insurers list Homayoon Mahjoob 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.

Is Homayoon Mahjoob affiliated with any hospitals?

According to CMS data, Homayoon Mahjoob is affiliated with University Of MD Capital Region Medical Center.

When was this NPI record last updated?

The NPPES record for Homayoon Mahjoob was last updated on October 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.