Dr. Marier D. Hernandez-Perez, MD
- Medicare services, 2024
- 3,116
- Medicare patients, 2024
- 1,794
- Hospital affiliations
- 3
- Industry payments
- $28
- Medical groups
- 2
- Practice address
- 111 Michigan Ave, NW, Washington, DC 20010
- Practice phone
- Call (202) 476-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hernandez-Perez's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Marier D. Hernandez-Perez is a pathologist in Washington, District of Columbia
Dr. Hernandez-Perez practices at Children's National Hospital in Washington, District of Columbia, part of Children's National Hospital.
Dr. Hernandez-Perez's NPI, 1396998761, was assigned on October 29, 2008. Dr. Hernandez-Perez holds Massachusetts license 237527.
- NPI
- 1396998761NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294954079
- NPI enumeration date
- October 29, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (202) 476-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marier D. Hernandez-Perez practices at Children's National Hospital in Washington, District of Columbia
Dr. Hernandez-Perez's primary practice is Children's National Hospital, at 111 Michigan Ave, NW, Washington, DC 20010 in The District County. The practice phone is (202) 476-5000.
- Children's National Hospital111 Michigan Ave, NW, Washington, DC 20010 · The District CountyPhone(202) 476-5000
Source: Dmand AI Affiliation Data
Dr. Marier D. Hernandez-Perez is affiliated with 4 sites of care and 2 medical groups
Dr. Hernandez-Perez's primary practice is Children's National Hospital in Washington, District of Columbia, part of Children's National Hospital. Dr. Hernandez-Perez is also affiliated with Massachusetts General Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Hernandez-Perez to 1 more hospital, 1 dialysis center and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Marier D. Hernandez-Perez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hernandez-Perez practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Children's National Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Children's National Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Marier D. Hernandez-Perez is one of 49 pathologists in District of Columbia
Anatomic pathology and clinical pathology is Dr. Hernandez-Perez's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Hernandez-Perez is licensed in Massachusetts.
Specialties and state licenses
- Anatomic pathology and clinical pathology, MassachusettsPrimary
Pathologists near Dr. Hernandez-Perez
Counts of pathologists 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. Marier D. Hernandez-Perez billed Medicare for 3,116 services in 2024
CMS data shows 3,116 Medicare services from Dr. Hernandez-Perez across 8 procedure codes in 2024, for 1,794 Medicare patients. Medicare paid $213,542 for them.
Where Dr. Hernandez-Perez's Medicare services took place, 2024
- In an office3,09899%
- In a facility181%
Dr. Hernandez-Perez compared with the District of Columbia median for pathologists, 2024
- Dr. Hernandez-Perez
- District of Columbia median
- Medicare services
- 3,116vs 1,1552.7 times
- Medicare patients
- 1,794vs 3694.9 times
Medians across 48 pathologists in District of Columbia with Dmand AI profiles that report each measure.
Dr. Hernandez-Perez's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Hernandez-Perez?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hernandez-Perez and other pathologists in District of Columbia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marier D. Hernandez-Perez treated 1,794 Medicare patients in 2024, average age 77
CMS counts 1,794 Medicare patients who saw Dr. Hernandez-Perez in 2024. The largest group is 75 to 84, with 771 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.05, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hernandez-Perez's median patient age at 66, with 54% women.
Dr. Hernandez-Perez's Medicare patients by age, 2024
Dr. Hernandez-Perez's Medicare patients by sex, 2024
- Women93752%
- Men85748%
Chronic conditions among Dr. Hernandez-Perez's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis43%
- Ischemic heart disease24%
- Anxiety22%
- Chronic kidney disease21%
- Cancer19%
- Atrial fibrillation18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hernandez-Perez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Marier D. Hernandez-Perez takes part in Medicare
Dr. Hernandez-Perez 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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Dr. Marier D. Hernandez-Perez received $28 in industry payments in 2019
CMS Open Payments shows 1 general payment to Dr. Hernandez-Perez from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Stemline Therapeutics Inc. paid the most, $28.
Companies that paid Dr. Hernandez-Perez the most, 2019 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Marier D. Hernandez-Perez'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 DataMedicare Physician & Other Practitioners - 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) |
| Industry payments | Open Payments (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. Marier D. Hernandez-Perez
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. Marier D. Hernandez-Perez's NPI number?
Dr. Marier D. Hernandez-Perez's NPI number is 1396998761. It was assigned on October 29, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Marier D. Hernandez-Perez?
Dr. Marier D. Hernandez-Perez is a pathologist in Washington, District of Columbia. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. Marier D. Hernandez-Perez practice?
Dr. Hernandez-Perez practices at 111 Michigan Ave, NW, Washington, DC 20010. Dr. Hernandez-Perez's primary practice is Children's National Hospital in Washington, District of Columbia, part of Children's National Hospital. Dmand AI also links Dr. Hernandez-Perez to 1 hospital, 1 dialysis center and 1 medical group.
What is Dr. Marier D. Hernandez-Perez's office phone number?
The practice phone on file for Dr. Hernandez-Perez is (202) 476-5000.
What is Dr. Marier D. Hernandez-Perez's medical license number?
Dr. Hernandez-Perez holds Massachusetts license 237527.
Which hospitals is Dr. Marier D. Hernandez-Perez affiliated with?
Dr. Hernandez-Perez practices at Children's National Hospital in Washington, District of Columbia. Dr. Hernandez-Perez is also affiliated with Massachusetts General Hospital. Dmand AI links Dr. Hernandez-Perez to 1 more hospital.
What medical group is Dr. Marier D. Hernandez-Perez part of?
Dr. Hernandez-Perez is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Hernandez-Perez to 1 more medical group.
Does Dr. Marier D. Hernandez-Perez accept Medicare?
Yes. CMS data shows Dr. Hernandez-Perez billed Medicare for 3,116 services in 2024, and Dr. Hernandez-Perez accepts Medicare assignment.
How many Medicare patients does Dr. Marier D. Hernandez-Perez see?
CMS counts 1,794 Medicare patients who saw Dr. Hernandez-Perez in 2024, with an average age of 77.
What services does Dr. Marier D. Hernandez-Perez bill to Medicare?
In 2024, Dr. Hernandez-Perez's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88342) and lab and pathology test (88341).
Has Dr. Marier D. Hernandez-Perez received payments from drug or device companies?
CMS Open Payments shows $28 in general payments to Dr. Hernandez-Perez from 1 company from 2019 to 2019. The largest total came from Stemline Therapeutics Inc.
How long has Dr. Marier D. Hernandez-Perez been practicing?
Dr. Hernandez-Perez graduated from medical school in 2004, 22 years ago.
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