Dr. Omar Abdelhamid Mazher, MD
- Medicare services, 2020
- 459
- Part D claims, 2024
- 84
- Hospital affiliations
- 3
- Medical groups
- 6
- State licenses
- 2
- Practice address
- 4228 Wisconsin Avenue, NW, Washington, DC 20016
- Practice phone
- Call (202) 885-5600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mazher's professional email, personal email and mobile number
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Dr. Omar Abdelhamid Mazher is a psychiatrist in Washington, District of Columbia
Dr. Mazher practices at The Psychiatric Institute of Washington in Washington, District of Columbia, part of Universal Health Services.
Dr. Mazher's NPI, 1558755777, was assigned on March 25, 2015. Dr. Mazher holds Virginia license 0101271346.
- NPI
- 1558755777NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1557676822
- NPI enumeration date
- March 25, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (202) 885-5600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Omar Abdelhamid Mazher practices at The Psychiatric Institute of Washington in Washington, District of Columbia
Dr. Mazher's primary practice is The Psychiatric Institute of Washington, at 4228 Wisconsin Avenue, NW, Washington, DC 20016 in The District County. The practice phone is (202) 885-5600.
- The Psychiatric Institute of Washington4228 Wisconsin Avenue, NW, Washington, DC 20016 · The District CountyPhone(202) 885-5600
Source: Dmand AI Affiliation Data
Dr. Omar Abdelhamid Mazher is affiliated with 3 sites of care and 6 medical groups
Dr. Mazher's primary practice is The Psychiatric Institute of Washington in Washington, District of Columbia, part of Universal Health Services. Dr. Mazher is also affiliated with Inova Mount Vernon Hospital. The medical group on file is Psychiatric Institute of Washington. Dmand AI also links Dr. Mazher to 1 more hospital and 5 medical groups, each named with a free account. Dr. Mazher's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Omar Abdelhamid Mazher's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mazher practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Psychiatric Institute of Washington | Available with a free account |
| +2 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Omar Abdelhamid Mazher is one of 220 psychiatrists in District of Columbia
Psychiatry is Dr. Mazher's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Mazher's licenses on file in 2 states: Virginia and Massachusetts.
Specialties and state licenses
- Psychiatry, VirginiaPrimary
- Massachusetts license
Psychiatrists near Dr. Mazher
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Omar Abdelhamid Mazher billed Medicare for 459 services in 2020
CMS data shows 459 Medicare services from Dr. Mazher across 5 procedure codes in 2020. Medicare paid $32,092 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mazher's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 2902020: 45958%
- Tests and treatments
- 2019: 152020: 0100%
Dr. Mazher compared with the District of Columbia median for psychiatrists, 2020
- Dr. Mazher
- District of Columbia median
- Medicare services
- 459vs 1333.5 times
- Part D claims
- 12vs 6180% below
Medians across 206 psychiatrists in District of Columbia with Dmand AI profiles that report each measure.
Dr. Mazher's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Mazher and other psychiatrists in District of Columbia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Omar Abdelhamid Mazher's patients have a median age of 41
Across all payers, Dmand AI patient panel data puts Dr. Mazher's median patient age at 41, with 38% women.
Dr. Mazher's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women38%
- Men62%
Source: Dmand AI Patient Panel Data
Dr. Omar Abdelhamid Mazher wrote 84 Medicare Part D claims in 2024
In 2024, Dr. Mazher wrote 84 Medicare Part D claims for 25 patients. 95% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $54 in total drug cost. In 2020, CMS named 327 claims across 16 drugs.
Dr. Mazher's Part D claims by kind of drug, 2024
- Generic80 claims95%
- Brand-name and other4 claims5%
Dr. Mazher's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2024
- 2020
- 2024
- Claims for drugs CMS names
- 2020: 3272024: 1296%
Drugs named by CMS: 1 in 2024, 16 in 2020.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Omar Abdelhamid Mazher takes part in Medicare
Dr. Mazher accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Dr. Omar Abdelhamid Mazher's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Omar Abdelhamid Mazher
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Omar Abdelhamid Mazher's NPI number?
Dr. Omar Abdelhamid Mazher's NPI number is 1558755777. It was assigned on March 25, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Omar Abdelhamid Mazher?
Dr. Omar Abdelhamid Mazher is a psychiatrist in Washington, District of Columbia. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Omar Abdelhamid Mazher practice?
Dr. Mazher practices at 4228 Wisconsin Avenue, NW, Washington, DC 20016. Dr. Mazher's primary practice is The Psychiatric Institute of Washington in Washington, District of Columbia, part of Universal Health Services. Dmand AI also links Dr. Mazher to 1 hospital and 5 medical groups.
What is Dr. Omar Abdelhamid Mazher's office phone number?
The practice phone on file for Dr. Mazher is (202) 885-5600.
What is Dr. Omar Abdelhamid Mazher's medical license number?
Dr. Mazher holds Virginia license 0101271346, one of the licenses on file in 2 states.
Which states has Dr. Omar Abdelhamid Mazher been licensed in?
Dmand AI has state licenses on file for Dr. Mazher in Virginia and Massachusetts.
Which hospitals is Dr. Omar Abdelhamid Mazher affiliated with?
Dr. Mazher practices at The Psychiatric Institute of Washington in Washington, District of Columbia. Dr. Mazher is also affiliated with Inova Mount Vernon Hospital. Dmand AI links Dr. Mazher to 1 more hospital.
What medical group is Dr. Omar Abdelhamid Mazher part of?
Dr. Mazher is linked to Psychiatric Institute of Washington. Dmand AI links Dr. Mazher to 5 more medical groups.
Does Dr. Omar Abdelhamid Mazher accept Medicare?
Yes. CMS data shows Dr. Mazher billed Medicare for 459 services in 2020, and Dr. Mazher accepts Medicare assignment.
What services does Dr. Omar Abdelhamid Mazher bill to Medicare?
In 2020, Dr. Mazher's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99231) and hospital inpatient care (99233).
What drugs does Dr. Omar Abdelhamid Mazher prescribe most?
In 2024 Medicare Part D data, Dr. Mazher's most prescribed drugs by claims were Venlafaxine HCl ER.
How long has Dr. Omar Abdelhamid Mazher been practicing?
Dr. Mazher graduated from medical school in 2015, 11 years ago.
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