Colonoscopy clinicians in Lancaster, Pennsylvania

CMS lists 49 clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice who have billed Medicare for at least one colonoscopy and practice in Lancaster, Pennsylvania (details below).

Colonoscopy volume

Clinician	Colonoscopies billed	Percentile rank
Norman Callahan, DO	297	96%
Rupal Kothari, DO	279	95%
Marc Hopkins, MD	274	95%
Austin Hwang, MD	255	94%
Michael Wolfson, MD	255	94%
Robert Frankel, MD	224	91%
William Huntington, DO	190	87%
Ryan Urbas, DO	186	87%
Anil Sharma, MD	177	85%
Nicole Albert, DO	171	84%
Dale Whitebloom, DO	144	79%
Robert Stokes, MD	143	78%
Paul Allegretti, DO	132	75%
Robert Bailey, DO	120	71%
Christopher Shih, MD	114	69%
David Smith, MD	112	68%
Justin Harberson, MD	108	67%
Evan Shelby, MD	108	67%
Anan Said, MD	107	67%
David Kerstetter, MD	106	66%
Ketan Kulkarni, MD	106	66%
Melissa Morgan, DO	103	65%
Scott Douglas, MD	102	65%
Mehul Lalani, MD	101	64%
Marc Happe, DO	99	64%
John Horwhat, MD	99	64%
Charles Calabrese, DO	97	63%
Ameet Parikh, MD	97	63%
Christopher Farrell, DO	96	62%
Joseph Chapman, MD	94	62%
Kaci Christian, MD	92	61%
John Betteridge, MD	91	60%
Rajih Alkhafaji, MD	88	59%
Rajesh Panchwagh, DO	88	59%
Ronald Brzana, MD	87	58%
Clifford Lomboy, MD	86	58%
Andrew Lee, MD	78	54%
Amanda Long, MD	78	54%
Mitul Patel, MD	75	52%
Lisa Yoo, DO	73	51%
Edmond Bou Assaf, MD	70	50%
Daniel Connell, MD	59	44%
Alison Platt, DO	59	44%
Richard Panicco, DO	57	43%
Janson Jacob, MD	53	41%
Mark Johnston, MD	52	40%
Frederick Ruthardt, MD	50	39%
Philip Joson, MD	49	38%
Steven Solga, MD	25	23%

Sorted by the number of colonoscopies billed to Medicare, highest first, not by quality or skill.

Understanding CMS Data

CMS's "Colonoscopy" category combines specific billing codes for colonoscopy to calculate the number of times each clinician billed Medicare for a "Colonoscopy." These include screening colonoscopy, diagnostic colonoscopy, and colonoscopy with biopsy or polyp removal. CMS's list also includes flexible sigmoidoscopy and laparoscopic appendectomy, so a clinician's count may include those procedures. CMS counts one procedure per patient per day, so a colonoscopy that included both a biopsy and a polyp removal counts once. CMS reports only procedures that clinicians billed to Original Medicare and Medicare Advantage. Therefore, CMS's procedure volume data does not include procedures that clinicians may have performed on patients who have other health care coverage (e.g., commercial insurance, self-pay, or the VA). Billing variation and coding errors can also affect CMS's data. Therefore, the number of procedures that CMS reports for a clinician may be higher or lower than the actual number of colonoscopies a clinician performed during the reporting period. Lastly, only clinicians with a primary specialty of Gastroenterology, Internal Medicine, Family Practice, or General Practice (as reported to Medicare) are presented.

Source: Centers for Medicare & Medicaid Services (August 18, 2026 release).