Dr. Harry William Kaplan, MD
- Medicare services, 2024
- 1,822
- Medicare patients, 2024
- 329
- Part D claims, 2024
- 7,681
- MIPS score, 2024
- 89
- Hospital affiliations
- 4
- Practice address
- 2700 Quarry Lake Drive, Suite 100, Baltimore, MD 21209
- Practice phone
- Call (410) 377-8900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Greenspring Surgery Center at Quarry Lake
Surgery Center - Medicare-Certified · Baltimore, Maryland
Find Dr. Kaplan's professional email, personal email and mobile number
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Dr. Harry William Kaplan is an internist in Baltimore, Maryland
Dr. Kaplan practices at Greenspring Surgery Center at Quarry Lake in Baltimore, Maryland.
Dr. Kaplan's NPI, 1538124631, was assigned on April 20, 2006. Dr. Kaplan graduated from New York University School of Medicine in 1989. Dr. Kaplan holds Maryland license D0040371.
- NPI
- 1538124631NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3375546195
- NPI enumeration date
- April 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 377-8900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Harry William Kaplan practices at Greenspring Surgery Center at Quarry Lake in Baltimore, Maryland
Dr. Kaplan's primary practice is Greenspring Surgery Center at Quarry Lake, at 2700 Quarry Lake Drive, Suite 100, Baltimore, MD 21209. The practice phone is (410) 377-8900.
- Greenspring Surgery Center at Quarry Lake2700 Quarry Lake Drive, Suite 100, Baltimore, MD 21209Phone(410) 377-8900
Source: Dmand AI Affiliation Data
Dr. Harry William Kaplan is affiliated with 9 sites of care
Dr. Kaplan's primary practice is Greenspring Surgery Center at Quarry Lake in Baltimore, Maryland. Dr. Kaplan is also affiliated with The Johns Hopkins Hospital. Dmand AI also links Dr. Kaplan to 3 more hospitals, 3 home health agencies and 1 physician office, 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. Harry William Kaplan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kaplan practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Greenspring Surgery Center at Quarry Lake | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Harry William Kaplan is one of 3,320 internists in Maryland
Internal medicine is Dr. Kaplan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kaplan is licensed in Maryland.
Specialties and state licenses
- Internal medicine, MarylandPrimary
Internists near Dr. Kaplan
Counts of internists 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. Harry William Kaplan billed Medicare for 1,822 services in 2024
CMS data shows 1,822 Medicare services from Dr. Kaplan across 10 procedure codes in 2024, for 329 Medicare patients. Medicare paid $134,884 for them. Every service was in an office.
Dr. Kaplan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9072024: 8803%
- Other services
- 2023: 4422024: 57931%
- Tests and treatments
- 2023: 2172024: 2264%
- Lab and pathology
- 2023: 1362024: 1371%
- Surgery
- 2023: 122024: 0100%
Dr. Kaplan compared with the Maryland median for internists, 2024
- Dr. Kaplan
- Maryland median
- Medicare services
- 1,822vs 6562.8 times
- Medicare patients
- 329vs 25131% above
- Part D claims
- 6,788vs 30922.0 times
Medians across 3,215 internists in Maryland with Dmand AI profiles that report each measure.
Dr. Kaplan'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. Kaplan and other internists in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Harry William Kaplan treated 329 Medicare patients in 2024, average age 78
CMS counts 329 Medicare patients who saw Dr. Kaplan in 2024. The largest group is 75 to 84, with 167 patients. 66% of them have high blood pressure, and 62% have high cholesterol. Their average risk score is 0.90, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Kaplan's median patient age at 75, with 50% women.
Dr. Kaplan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Kaplan's Medicare patients by sex, 2024
- Women17653%
- Men15347%
Chronic conditions among Dr. Kaplan's Medicare patients, 2024
- High blood pressure66%
- High cholesterol62%
- Arthritis52%
- Diabetes26%
- Ischemic heart disease21%
- Atrial fibrillation20%
- Cancer17%
- Osteoporosis17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Kaplan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Harry William Kaplan wrote 7,681 Medicare Part D claims in 2024
In 2024, Dr. Kaplan wrote 7,681 Medicare Part D claims for 362 patients. 85% of them were for generic drugs. CMS names the drug for 6,788 of them, across 130 drugs with 11 or more claims each, at $814,700 in total drug cost. In 2023, CMS named 5,711 claims across 124 drugs.
Dr. Kaplan's Part D claims by kind of drug, 2024
- Generic6,512 claims85%
- Brand-name1,141 claims15%
- Other28 claims0%
Dr. Kaplan'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.
Drug classes CMS tracks in Dr. Kaplan's Part D claims, 2024
- Opioids2%180 of 7,681 claims
- Antibiotics6%468 of 7,681 claims
- Antipsychotics, patients 65 and over0%15 of 7,681 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,7112024: 6,78819%
Drugs named by CMS: 130 in 2024, 124 in 2023.
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
Dr. Harry William Kaplan scored 89 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 89 out of 100 for Dr. Kaplan for performance year 2024, reported individually. Dr. Kaplan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Kaplan's MIPS scores, performance year 2024
- 89of 100Final score
- 90.1of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 73of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Harry William Kaplan received $25,100 in industry payments from 2016 to 2025
CMS Open Payments shows 743 general payments to Dr. Kaplan from 53 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 52% of the total. Amgen Inc. paid the most, $13,446.
General payments to Dr. Kaplan by program year, 2016 to 2025
General payments to Dr. Kaplan by kind, 2016 to 2025
- Food and beverage$13,04552%
- Speaker and faculty fees$10,20041%
- Consulting fees$1,6206%
- Travel and lodging$1501%
- Education$850%
Companies that paid Dr. Kaplan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Harry William Kaplan graduated from New York University School of Medicine
Dr. Kaplan graduated from New York University School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Harry William Kaplan'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) |
| 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)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. Harry William Kaplan
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. Harry William Kaplan's NPI number?
Dr. Harry William Kaplan's NPI number is 1538124631. It was assigned on April 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Harry William Kaplan?
Dr. Harry William Kaplan is an internist in Baltimore, Maryland. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Harry William Kaplan practice?
Dr. Kaplan practices at 2700 Quarry Lake Drive, Suite 100, Baltimore, MD 21209. Dr. Kaplan's primary practice is Greenspring Surgery Center at Quarry Lake in Baltimore, Maryland. Dmand AI also links Dr. Kaplan to 3 hospitals, 3 home health agencies and 1 physician office.
What is Dr. Harry William Kaplan's office phone number?
The practice phone on file for Dr. Kaplan is (410) 377-8900.
What is Dr. Harry William Kaplan's medical license number?
Dr. Kaplan holds Maryland license D0040371.
Which hospitals is Dr. Harry William Kaplan affiliated with?
Dr. Kaplan is affiliated with The Johns Hopkins Hospital. Dmand AI links Dr. Kaplan to 3 more hospitals.
Does Dr. Harry William Kaplan accept Medicare?
Yes. CMS data shows Dr. Kaplan billed Medicare for 1,822 services in 2024, and Dr. Kaplan accepts Medicare assignment.
What is Dr. Harry William Kaplan's MIPS score?
Dr. Kaplan's MIPS final score for performance year 2024 is 89 out of 100, reported individually.
How many Medicare patients does Dr. Harry William Kaplan see?
CMS counts 329 Medicare patients who saw Dr. Kaplan in 2024, with an average age of 78.
What services does Dr. Harry William Kaplan bill to Medicare?
In 2024, Dr. Kaplan's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and medicare service (G2211).
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Where did Dr. Harry William Kaplan go to medical school?
Dr. Kaplan graduated from New York University School of Medicine in 1989.
What drugs does Dr. Harry William Kaplan prescribe most?
In 2024 Medicare Part D data, Dr. Kaplan's most prescribed drugs by claims were Rosuvastatin Calcium, Levothyroxine Sodium and Losartan Potassium.
Has Dr. Harry William Kaplan received payments from drug or device companies?
CMS Open Payments shows $25,100 in general payments to Dr. Kaplan from 53 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Harry William Kaplan been practicing?
Dr. Kaplan graduated from medical school in 1989, 37 years ago.
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