Lydia Slater, DO
Internal Medicine Physician · Lancaster, PA
Lydia Slater, DO is an internal medicine physician with a practice address in Lancaster, Pennsylvania, and NPI 1720570724, issued on Jun 5, 2018. Check the license (Pennsylvania OS021600, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Lydia Slater
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS021600 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2110 Harrisburg Pike Ste 100, Lancaster, PA 17601
- Phone
- (717) 544-3191
- Enumerated
- Jun 5, 2018
- Record last updated
- Sep 22, 2022
- Fax
- (717) 544-3637
- Medicare enrollment
- Enrolled (PECOS I20210922002421); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,300 in Pennsylvania → Look up another NPI →
Also registered at 2110 Harrisburg Pike Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aaron HillerInternal Medicine Physician1205499985
- Tuc To, MDInternal Medicine Physician1134651946
- Adriana Webber, FNP-CFamily Nurse Practitioner1407313935
Verify Lydia Slater in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS021600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% more Medicare Part D claims than the average internal medicine physician in 2024
3,794 Medicare Part D claims for 669 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 53 claims were for opioids.
Most prescribed
- Atorvastatin Calcium216 claims
- Levothyroxine Sodium191 claims
- Amlodipine Besylate184 claims
- Losartan Potassium147 claims
- Lisinopril144 claims
- Rosuvastatin Calcium139 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.
Bills Medicare through one group practice
- Lancaster General Medical GroupLancaster, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lydia Slater among 7,300 internal medicine physician records in Pennsylvania
Lydia Slater, DO 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 2018, is newer than 71% of them.
- NPI issued2018 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2018 · median 2008 among the 4,208 with a school on file
- Record last updated2022 · 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).
91 internal medicine physician records list a practice address in Lancaster
They are 91 of the 5,378 NPPES records with a practice address in Lancaster, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Lancaster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sylvia Allwardt, MDLancaster, PA 176011609819580
- Jennie Barbieri, MDLancaster, PA 176011285836015
- Jarol Boan, M.D.Lancaster, PA 176011427007541
- Maria Calderon, MDLancaster, PA 176011326152760
- Paul Conslato, M.D.Lancaster, PA 176011366431934
- Elizabeth Ehrlich Chapman, DOLancaster, PA 176011528450483
- Marion George, MDLancaster, PA 176011205816295
- Thomas Grana, D.O.Lancaster, PA 176011437247954
Common questions
What is Lydia Slater, DO's NPI number?
Lydia Slater, DO's National Provider Identifier (NPI) is 1720570724, issued on Jun 5, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Lydia Slater, DO located?
The NPPES record lists a practice address at 2110 Harrisburg Pike Ste 100, Lancaster, PA, 17601. Phone: (717) 544-3191. Providers update this record themselves, so call before visiting.
How can I verify Lydia Slater, DO's license?
NPPES lists Pennsylvania license number OS021600, 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 Lydia Slater, DO prescribe under Medicare Part D?
In 2024, Lydia Slater, DO had 3,794 Medicare Part D claims for 669 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.