Grant Knoll, MD
Internal Medicine Physician · Wynnewood, PA
Grant Knoll, MD is an internal medicine physician with a practice address in Wynnewood, Pennsylvania, and NPI 1447980958, issued on Jun 16, 2022. Check the license (Pennsylvania MD489189, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Grant Knoll
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD489189 PA
Self-reported in NPPES; status is on the state search - Practice location
- 100 E Lancaster Ave, Wynnewood, PA 19096
- Phone
- (484) 476-6421
- Enumerated
- Jun 16, 2022
- Record last updated
- May 19, 2025
- Medicare enrollment
- Enrolled (PECOS I20250628000376); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 100 E Lancaster Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Grant Knoll in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD489189Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average internal medicine physician in 2024
363 Medicare Part D claims for 55 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate22 claims
- Furosemide22 claims
- Atorvastatin Calcium18 claims
- Nifedipine Er16 claims
- Albuterol Sulfate Hfa14 claims
- Flecainide Acetate13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $22.17
1 payment: food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Main Line HealthcareWynewood, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Knoll among 7,300 internal medicine physician records in Pennsylvania
Grant Knoll, MD is one of 7,300 internal medicine physician records with a practice address in Pennsylvania. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 85% of them.
- NPI issued2022 · 85% of these records are older, 11% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2022 · median 2008 among the 4,208 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
150 internal medicine physician records list a practice address in Wynnewood
They are 150 of the 1,246 NPPES records with a practice address in Wynnewood, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Wynnewood → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- M Susan Burke, MDWynnewood, PA 190961083694442
- David Cohen, MDWynnewood, PA 190961215908645
- Donald Corey, MDWynnewood, PA 190961245201706
- Daniel Lazowick, DOWynnewood, PA 190961063483527
- William Miller, M.D.Wynnewood, PA 190961801850060
- James Morris, MDWynnewood, PA 190961912979923
- John Nansteel, MDWynnewood, PA 190961558333583
- Colleen O'Connor, MDWynnewood, PA 190961922087154
Common questions
What is Grant Knoll, MD's NPI number?
Grant Knoll, MD's National Provider Identifier (NPI) is 1447980958, issued on Jun 16, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Grant Knoll, MD located?
The NPPES record lists a practice address at 100 E Lancaster Ave, Wynnewood, PA, 19096. Phone: (484) 476-6421. Providers update this record themselves, so call before visiting.
How can I verify Grant Knoll, MD's license?
NPPES lists Pennsylvania license number MD489189, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Grant Knoll, MD prescribe under Medicare Part D?
In 2024, Grant Knoll, MD had 363 Medicare Part D claims for 55 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.