DR. JOHN DAVID HORWHAT M.D.
NPI 1487747242
Internal Medicine - Gastroenterology in Lancaster, PA

Q: What is John Horwhat's NPI number?

The NPI number for John Horwhat is 1487747242. It was assigned to this individual provider in the NPPES registry on October 2, 2006.

Q: What is John Horwhat's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for John Horwhat was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 02, 2006PECOS EnrolledAccepts Medicare Assignment

2112 HARRISBURG PIKE, SUITE 202, LANCASTER, PA 17601(717) 544-3500(717) 544-3501 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Mar 7, 2023, Jun 13, 2019 (2 updates tracked since 2019).

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About Dr. John David Horwhat M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN DAVID HORWHAT M.D. (NPI 1487747242) is an individual gastroenterology provider in Lancaster, Pennsylvania, licensed in Pennsylvania (MD053834L) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Lancaster General Hospital, and is a graduate of Temple University School Of Medicine (1992).

NPPES Registry Identity

NPI1487747242

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. JOHN DAVID HORWHATCredential: M.D.

Location Address2112 HARRISBURG PIKE, SUITE 202Lancaster, PA 17601-2644

Mailing Address2112 Harrisburg Pike Ste 202Lancaster, PA 17601-2644 · (717) 869-4600 · Fax (717) 544-3501

Phone(717) 544-3500

Fax(717) 544-3501

Sole ProprietorNo

Medical School CMSTemple University School Of MedicineGraduated 1992

Enumeration DateOctober 2, 2006

Last NPPES UpdateMarch 7, 20232 updates tracked since enumeration

✔ NPI 1487747242 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in PA · MD053834L

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

2112 HARRISBURG PIKE, Lancaster, PA 17601

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Other Identifiers 5

Medicaid1027860230001PA

OtherMD053834LPA · License

Other264171KKUPA · Medicare

Medicaid1027860230003PA

OtherP10842468PA · Rr Medicare

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John David Horwhat M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3779661541

PECOS Enrollment IDI20130204000040

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 17

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, vedolizumab, intravenous, 1 mg J3380

Vedolizumab is a medication given via injection. It's used to treat certain bowel conditions (such as Crohn's disease, ulcerative colitis) by reducing inflammation. It works by blocking a certain protein that causes this inflammation.

3,300 services11 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

109 services108 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

48 services46 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

42 services40 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

27 services27 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

24 services23 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

23 services23 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

23 services23 patients

Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth 43237

This procedure involves a flexible tube with a camera and ultrasound device, inserted through the mouth to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like inflammation, tumors, or other abnormalities.

19 services19 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

19 services19 patients

Removal of large bowel tissue using a flexible endoscope 45390

This procedure, known as a colonoscopy, involves using a flexible endoscope to examine and potentially remove tissue from the large intestine. The endoscope allows the doctor to view the bowel lining directly and remove any abnormal tissue for further analysis.

18 services18 patients

Review by radiologist of image from tube placement into bile duct using an endoscope 74328

This procedure involves a specialist, called a radiologist, examining an image taken during a tube placement into your bile duct. The tube is inserted with the help of a tool called an endoscope. This allows the doctor to check for any issues or abnormalities in your bile duct.

17 services16 patients

Ultrasound guided needle aspiration or biopsy of esophagus using a flexible endoscope 43238

An ultrasound guided needle aspiration or biopsy of the esophagus involves using a flexible tube with a camera (endoscope) to view your esophagus. An ultrasound device on the endoscope helps to guide a needle to take a small tissue sample for testing. This is a safe, minimally invasive procedure.

14 services14 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

13 services13 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

12 services12 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

11 services11 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lancaster General Hospital

Acute Care Hospitals · Lancaster, PA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number390100

Location555 North Duke StreetLancaster, PA 17602 · Lancaster County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 17601 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$126.34 typical visit price

range $54.64 – $166.87

Typical copayment $31.58 (range $13.66 – $41.71)

Most-billed visit code 99204

Established Patient

$96.82 typical visit price

range $17.33 – $135.84

Typical copayment $24.20 (range $4.33 – $33.96)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARK H JOHNSTON MD

Internal Medicine (Gastroenterology)

2112 HARRISBURG PIKE, SUITE 202
LANCASTER, PA 17601

Lancaster County (717) 544-3500

FOTINI DEBONERA MD

Family Medicine

2112 HARRISBURG PIKE, SUITE 312
LANCASTER, PA 17601

Lancaster County (717) 544-3022

CHARLES R ROST M.D.

Internal Medicine (Endocrinology, Diabetes & Metabolism)

2112 HARRISBURG PIKE, SUITE 200
LANCASTER, PA 17601

Lancaster County (717) 544-3059

ALYSSA R SOBIERAY RD

Dietitian, Registered

2112 HARRISBURG PIKE, SUITE 312
LANCASTER, PA 17601

Lancaster County (717) 291-8399

DR. PAUL DAVID ALLEGRETTI D.O.

Internal Medicine (Gastroenterology)

2112 HARRISBURG PIKE, SUITE 202
LANCASTER, PA 17601

Lancaster County (717) 544-3500

STEVE T CHEN M.D.

Internal Medicine (Gastroenterology)

2112 HARRISBURG PIKE, STE 202
LANCASTER, PA 17601

Lancaster County (717) 544-3500

ANNA KWAKYE ANTWI CRNP

Nurse Practitioner (Family)

2112 HARRISBURG PIKE, STE 200
LANCASTER, PA 17601

Lancaster County (717) 544-3059

HEATHER M FRIED CRNP

Nurse Practitioner (Family)

2112 HARRISBURG PIKE
LANCASTER, PA 17601

Lancaster County (717) 544-3022

MATTHEW SAUDER M.D.

Internal Medicine (Endocrinology, Diabetes & Metabolism)

2112 HARRISBURG PIKE, STE 200
LANCASTER, PA 17601

Lancaster County (717) 544-3059

MIDATLANTIC ENDOSCOPY LLC

Clinic/Center (Ambulatory Surgical)

2112 HARRISBURG PIKE, SUITE 323
LANCASTER, PA 17601

Lancaster County (717) 544-3569

TODD FRANK

Hearing Instrument Specialist

2112 HARRISBURG PIKE
LANCASTER, PA 17601

Lancaster County (717) 544-0327

RUTHANNE M ASHWORTH CRNP

Nurse Practitioner (Family)

2112 HARRISBURG PIKE, SUITE 202
LANCASTER, PA 17601

Lancaster County (717) 544-3500

PETER DAVID EATON CRNA

Nurse Anesthetist, Certified Registered

2112 HARRISBURG PIKE, SUITE 323
LANCASTER, PA 17601

Lancaster County (717) 544-3500

JASON THOMAS FUEHRER DPT

Physical Therapist

2112 HARRISBURG PIKE, SUITE 321
LANCASTER, PA 17601

Lancaster County (717) 757-3537

CLARA WHITE CRNP

Nurse Practitioner

2112 HARRISBURG PIKE, SUITE 200
LANCASTER, PA 17601

Lancaster County (717) 544-3059

DAVID M. WESTON M.D.

Internal Medicine (Gastroenterology)

2112 HARRISBURG PIKE, STE 202
LANCASTER, PA 17601

Lancaster County (717) 544-3500

DR. STEPHEN T BELL M.D.

Internal Medicine (Cardiovascular Disease)

2112 HARRISBURG PIKE, SUITE 100
LANCASTER, PA 17601

Lancaster County (717) 299-5000

BWB ASSOCIATES, LLC

Audiologist-Hearing Aid Fitter

2112 HARRISBURG PIKE, STE 2
LANCASTER, PA 17601

Lancaster County (717) 544-0327

AMBER S PERKINS RD, LDN

Internal Medicine (Nephrology)

2112 HARRISBURG PIKE, SUITE 312
LANCASTER, PA 17601

Lancaster County (717) 544-3232

TERASA M ASTARITA CRNP

Nurse Practitioner (Adult Health)

2112 HARRISBURG PIKE, SUITE 202
LANCASTER, PA 17601

Lancaster County (717) 544-3500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Horwhat's NPI number?

The NPI number for John Horwhat is 1487747242. It was assigned to this individual provider in the NPPES registry on October 2, 2006.

Where is John Horwhat located?

John Horwhat practices at 2112 Harrisburg Pike Suite 202, Lancaster, PA 17601. The listed phone number is (717) 544-3500.

What is John Horwhat's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is John Horwhat enrolled in Medicare?

Yes. John Horwhat is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does John Horwhat accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Buckeye Health Plan list John Horwhat as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is John Horwhat affiliated with any hospitals?

According to CMS data, John Horwhat is affiliated with Lancaster General Hospital.

When was this NPI record last updated?

The NPPES record for John Horwhat was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.