Leon M. Simms, PA-C
- Medicare services, 2024
- 35
- Medicare patients, 2024
- 91
- Part D claims, 2024
- 39
- Hospital affiliations
- 2
- Industry payments
- $86
- Practice address
- 1500 Forest Glen Road, Silver Spring, MD 20910
- Practice phone
- Call (301) 754-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Leon Simms' professional email, personal email and mobile number
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Leon M. Simms is a surgical physician assistant in Silver Spring, Maryland
Leon Simms practices at Holy Cross Hospital in Silver Spring, Maryland, part of Trinity Health.
Leon Simms' NPI, 1093107997, was assigned on March 2, 2015. Leon Simms holds California license PA52384.
- NPI
- 1093107997NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860704137
- NPI enumeration date
- March 2, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 754-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Leon M. Simms practices at Holy Cross Hospital in Silver Spring, Maryland
Leon Simms' primary practice is Holy Cross Hospital, at 1500 Forest Glen Road, Silver Spring, MD 20910 in Montgomery County. The practice phone is (301) 754-7000.
- Holy Cross Hospital1500 Forest Glen Road, Silver Spring, MD 20910 · Montgomery CountyPhone(301) 754-7000
Source: Dmand AI Affiliation Data
Leon M. Simms is affiliated with 5 sites of care and 11 medical groups
Leon Simms' primary practice is Holy Cross Hospital in Silver Spring, Maryland, part of Trinity Health. Leon Simms is also affiliated with Luminis Health Doctors Community Medical Center. The medical group on file is Professional Services of Holy Cross. Dmand AI also links Leon Simms to 10 more medical groups and 3 group practices and clinics, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Leon M. Simms' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Leon Simms practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Holy Cross Hospital | Available with a free account |
| +4 more sites and 10 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Trinity Health and 6.2K+ hospitals, with verified contacts in the same login.
Leon M. Simms is one of 275 surgical physician assistants in Maryland
Surgical is Leon Simms' primary specialty in the NPI Registry, under taxonomy code 363AS0400X. Leon Simms is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Dmand AI has Leon Simms' licenses on file in 2 states: California and Virginia.
Specialties and state licenses
- Surgical physician assistant, CaliforniaPrimary
- Medical physician assistant, Virginia
Clinical focus
Dmand AI lists broken or dislocated ankle/ or foot and joint or bone infection among the conditions Leon Simms treats.
Surgical physician assistants near Leon Simms
Counts of surgical physician assistants 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
Leon M. Simms billed Medicare for 35 services in 2024
CMS data shows 35 Medicare services from Leon Simms across 1 procedure code in 2024, all of them office visits, for 91 Medicare patients. Medicare paid $2,259 for them. Every service was in an office.
Leon Simms compared with the Maryland median for surgical physician assistants, 2024
- Leon Simms
- Maryland median
- Medicare patients
- 91vs 7423% above
Medians across 189 surgical physician assistants in Maryland with Dmand AI profiles that report each measure.
Leon Simms' 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 Leon Simms and other surgical physician assistants in Maryland.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Leon M. Simms treated 91 Medicare patients in 2024, average age 77
CMS counts 91 Medicare patients who saw Leon Simms in 2024. The largest group is 65 to 74, with 33 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 1.75, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Leon Simms' median patient age at 69, with 45% women.
Leon Simms' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Leon Simms' Medicare patients by sex, 2024
- Women5965%
- Men3235%
Chronic conditions among Leon Simms' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis65%
- Diabetes52%
- Chronic kidney disease31%
- Mood disorders31%
- Ischemic heart disease30%
- Anxiety29%
Share of Medicare patients with each condition. A patient can have several.
Leon Simms' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Leon M. Simms wrote 39 Medicare Part D claims in 2024
In 2024, Leon Simms wrote 39 Medicare Part D claims for 23 patients. 97% of them were for generic drugs.
Leon Simms' Part D claims by kind of drug, 2024
- Generic38 claims97%
- Brand-name and other1 claims3%
Drug classes CMS tracks in Leon Simms' Part D claims, 2024
- Opioids33%13 of 39 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Leon M. Simms takes part in Medicare
Leon Simms 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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Leon M. Simms received $86 in industry payments in 2024
CMS Open Payments shows 4 general payments to Leon Simms from 3 drug and device companies in 2024. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $49.
Companies that paid Leon Simms the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Leon M. Simms is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Leon M. Simms'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 (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) |
| 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 Leon M. Simms
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Leon M. Simms' NPI number?
Leon M. Simms' NPI number is 1093107997. It was assigned on March 2, 2015, and it is active in the NPI Registry.
What does Leon M. Simms specialize in?
Leon M. Simms is a surgical physician assistant in Silver Spring, Maryland. The primary specialty in the NPI Registry is Surgical Physician Assistant (taxonomy code 363AS0400X).
Where does Leon M. Simms practice?
Leon Simms practices at 1500 Forest Glen Road, Silver Spring, MD 20910. Leon Simms' primary practice is Holy Cross Hospital in Silver Spring, Maryland, part of Trinity Health. Dmand AI also links Leon Simms to 10 medical groups and 3 group practices and clinics.
What is Leon M. Simms' office phone number?
The practice phone on file for Leon Simms is (301) 754-7000.
What is Leon M. Simms' medical license number?
Leon Simms holds California license PA52384, one of the licenses on file in 2 states.
Which states has Leon M. Simms been licensed in?
Dmand AI has state licenses on file for Leon Simms in California and Virginia.
Which hospitals is Leon M. Simms affiliated with?
Leon Simms practices at Holy Cross Hospital in Silver Spring, Maryland. Leon Simms is also affiliated with Luminis Health Doctors Community Medical Center.
What medical group is Leon M. Simms part of?
Leon Simms is linked to Professional Services of Holy Cross. Dmand AI links Leon Simms to 10 more medical groups.
Does Leon M. Simms accept Medicare?
Yes. CMS data shows Leon Simms billed Medicare for 35 services in 2024, and Leon Simms accepts Medicare assignment.
How many Medicare patients does Leon M. Simms see?
CMS counts 91 Medicare patients who saw Leon Simms in 2024, with an average age of 77.
Show 4 more questionsShow fewer questions
Is Leon M. Simms board certified?
Yes. Leon Simms is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
What services does Leon M. Simms bill to Medicare?
In 2024, Leon Simms' most billed Medicare services were office visit, established patient (99213).
Has Leon M. Simms received payments from drug or device companies?
CMS Open Payments shows $86 in general payments to Leon Simms from 3 companies from 2024 to 2024. The largest total came from Amgen Inc.
How long has Leon M. Simms been practicing?
Leon Simms graduated from medical school in 2014, 12 years ago.
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