Dr. Margaret M. Shaffer, MD
- Medicare services, 2024
- 2,423
- Medicare patients, 2024
- 794
- MIPS score, 2024
- 83
- Hospital affiliations
- 1
- Industry payments
- $46
- Practice address
- 5255 Loughboro Rd NW, Washington, DC 20016
- Practice phone
- Call (202) 537-4680
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Shaffer's professional email, personal email and mobile number
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Dr. Margaret M. Shaffer is a pathologist in Washington, District of Columbia
Dr. Shaffer practices at Sibley Memorial Hospital in Washington, District of Columbia, part of Johns Hopkins Health System.
Dr. Shaffer's NPI, 1851507719, was assigned on May 15, 2007. Dr. Shaffer graduated from George Washington University School of Medicine in 1989. Dr. Shaffer holds Maryland license D79890.
- NPI
- 1851507719NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082671771
- NPI enumeration date
- May 15, 2007
- NPI status
- Active
- Practice phone
- (202) 537-4680
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Margaret M. Shaffer practices at Sibley Memorial Hospital in Washington, District of Columbia
Dr. Shaffer's primary practice is Sibley Memorial Hospital, at 5255 Loughboro Rd NW, Washington, DC 20016 in The District County. The practice phone is (202) 537-4680.
- Sibley Memorial Hospital5255 Loughboro Rd NW, Washington, DC 20016 · The District CountyPhone(202) 537-4680
Source: Dmand AI Affiliation Data
Dr. Margaret M. Shaffer is affiliated with 1 site of care and 2 medical groups
Dr. Shaffer's primary practice is Sibley Memorial Hospital in Washington, District of Columbia, part of Johns Hopkins Health System. The medical group on file is Johns Hopkins University. Dmand AI also links Dr. Shaffer to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Margaret M. Shaffer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shaffer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sibley Memorial Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Margaret M. Shaffer is one of 49 pathologists in District of Columbia
Anatomic pathology and clinical pathology is Dr. Shaffer's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dmand AI has Dr. Shaffer's licenses on file in 2 states: Maryland and District of Columbia.
Specialties and state licenses
- Anatomic pathology and clinical pathology, MarylandPrimary
- District of Columbia license
Pathologists near Dr. Shaffer
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. Margaret M. Shaffer billed Medicare for 2,423 services in 2024
CMS data shows 2,423 Medicare services from Dr. Shaffer across 13 procedure codes in 2024, for 794 Medicare patients. Medicare paid $80,452 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Shaffer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 2,9032024: 2,42317%
- Other services
- 2023: 252024: 0100%
Dr. Shaffer compared with the District of Columbia median for pathologists, 2024
- Dr. Shaffer
- District of Columbia median
- Medicare services
- 2,423vs 1,1552.1 times
- Medicare patients
- 794vs 3692.2 times
Medians across 48 pathologists in District of Columbia with Dmand AI profiles that report each measure.
Dr. Shaffer'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Shaffer 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. Margaret M. Shaffer treated 794 Medicare patients in 2024, average age 76
CMS counts 794 Medicare patients who saw Dr. Shaffer in 2024. The largest group is 75 to 84, with 357 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.19, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Shaffer's median patient age at 56, with 64% women.
Dr. Shaffer's Medicare patients by age, 2024
Dr. Shaffer's Medicare patients by sex, 2024
- Women49562%
- Men29938%
Chronic conditions among Dr. Shaffer's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis57%
- Cancer38%
- Ischemic heart disease26%
- Diabetes24%
- Osteoporosis23%
- Mood disorders21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Shaffer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women64%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Margaret M. Shaffer scored 83 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 83 out of 100 for Dr. Shaffer for performance year 2024, reported as part of a group.
Dr. Shaffer's MIPS scores, performance year 2024
- 83of 100Final score
- 73.9of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 70of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Margaret M. Shaffer received $46 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Shaffer from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Kerecis Limited paid the most, $46.
Companies that paid Dr. Shaffer the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Margaret M. Shaffer graduated from George Washington University School of Medicine
Dr. Shaffer graduated from George Washington University School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Margaret M. Shaffer'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 | Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Margaret M. Shaffer
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. Margaret M. Shaffer's NPI number?
Dr. Margaret M. Shaffer's NPI number is 1851507719. It was assigned on May 15, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Margaret M. Shaffer?
Dr. Margaret M. Shaffer 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. Margaret M. Shaffer practice?
Dr. Shaffer practices at 5255 Loughboro Rd NW, Washington, DC 20016. Dr. Shaffer's primary practice is Sibley Memorial Hospital in Washington, District of Columbia, part of Johns Hopkins Health System. Dmand AI also links Dr. Shaffer to 1 medical group.
What is Dr. Margaret M. Shaffer's office phone number?
The practice phone on file for Dr. Shaffer is (202) 537-4680.
What is Dr. Margaret M. Shaffer's medical license number?
Dr. Shaffer holds Maryland license D79890, one of the licenses on file in 2 states.
Which states has Dr. Margaret M. Shaffer been licensed in?
Dmand AI has state licenses on file for Dr. Shaffer in Maryland and District of Columbia.
Which hospitals is Dr. Margaret M. Shaffer affiliated with?
Dr. Shaffer practices at Sibley Memorial Hospital in Washington, District of Columbia.
What medical group is Dr. Margaret M. Shaffer part of?
Dr. Shaffer is linked to Johns Hopkins University. Dmand AI links Dr. Shaffer to 1 more medical group.
Does Dr. Margaret M. Shaffer accept Medicare?
Yes. CMS data shows Dr. Shaffer billed Medicare for 2,423 services in 2024.
What is Dr. Margaret M. Shaffer's MIPS score?
Dr. Shaffer's MIPS final score for performance year 2024 is 83 out of 100, reported as part of a group.
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How many Medicare patients does Dr. Margaret M. Shaffer see?
CMS counts 794 Medicare patients who saw Dr. Shaffer in 2024, with an average age of 76.
What services does Dr. Margaret M. Shaffer bill to Medicare?
In 2024, Dr. Shaffer's most billed Medicare services were lab and pathology test (88305), lab and pathology test (88341) and lab and pathology test (88173).
Where did Dr. Margaret M. Shaffer go to medical school?
Dr. Shaffer graduated from George Washington University School of Medicine in 1989.
Has Dr. Margaret M. Shaffer received payments from drug or device companies?
CMS Open Payments shows $46 in general payments to Dr. Shaffer from 1 company from 2025 to 2025. The largest total came from Kerecis Limited.
How long has Dr. Margaret M. Shaffer been practicing?
Dr. Shaffer graduated from medical school in 1989, 37 years ago.
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