Caitlin Johanna Warf, DO
Internal Medicine Physician · Harrisburg, PA
Caitlin Johanna Warf, DO is an internal medicine physician with a practice address in Harrisburg, Pennsylvania, and NPI 1720329170, issued on Mar 11, 2013. Check the license (Pennsylvania OS017624, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Caitlin Johanna Warf
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- OS017624 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4830 Londonderry RD, Harrisburg, PA 17109
- Phone
- (717) 657-2595
- Enumerated
- Mar 11, 2013
- Record last updated
- Jul 27, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (717) 657-3091
- Medicare enrollment
- Enrolled (PECOS I20150707000937); 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 4830 Londonderry RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mark Brown, MSPTPhysical Therapist1225072739
- Brieann BuletzaPhysical Therapist1588188858
- Brian Deramo, DOInternal Medicine Physician1427088525
- Sara IbachPhysician Assistant1134800154
Verify Caitlin Johanna Warf in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS017624Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average internal medicine physician in 2024
10,006 Medicare Part D claims for 562 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. 226 claims were for opioids.
Most prescribed
- Atorvastatin Calcium586 claims
- Losartan Potassium449 claims
- Levothyroxine Sodium418 claims
- Amlodipine Besylate409 claims
- Metoprolol Succinate243 claims
- Pantoprazole Sodium241 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: $1,410.84
73 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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
- Family Practice Center PCMiddleburg, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Caitlin Johanna Warf among 7,300 internal medicine physician records in Pennsylvania
Caitlin Johanna Warf, 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 2013, is newer than 57% of them.
- NPI issued2013 · 57% of these records are older, 40% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2012 · median 2008 among the 4,208 with a school on file
- Record last updated2015 · 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).
184 internal medicine physician records list a practice address in Harrisburg
They are 184 of the 3,963 NPPES records with a practice address in Harrisburg, and 7,300 internal medicine physician records in Pennsylvania.
All 7,300 in Pennsylvania → Every provider in Harrisburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lawrence Appel, MDHarrisburg, PA 171091952375453
- Jeffrey Backenstoes, D.O.Harrisburg, PA 171091215985270
- Sevdalina Boshnakov, MDHarrisburg, PA 171091710090212
- David Bronstein, DOHarrisburg, PA 171091194758094
- Mary Davies, MDHarrisburg, PA 171091831113620
- Brian Deramo, DOHarrisburg, PA 171091427088525
- John Freshman, MDHarrisburg, PA 171091659330074
- Charles Gerlach, M.D.Harrisburg, PA 171091053369447
Common questions
What is Caitlin Johanna Warf, DO's NPI number?
Caitlin Johanna Warf, DO's National Provider Identifier (NPI) is 1720329170, issued on Mar 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Caitlin Johanna Warf, DO located?
The NPPES record lists a practice address at 4830 Londonderry RD, Harrisburg, PA, 17109. Phone: (717) 657-2595. Providers update this record themselves, so call before visiting.
How can I verify Caitlin Johanna Warf, DO's license?
NPPES lists Pennsylvania license number OS017624, 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 Caitlin Johanna Warf, DO prescribe under Medicare Part D?
In 2024, Caitlin Johanna Warf, DO had 10,006 Medicare Part D claims for 562 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.