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Edit this profileAt a glance
- 817 Lawn Ave, Sellersville, PA 18960
About Dr. Markos
Ronald P. Markos, MD is a healthcare provider in Sellersville, PA specializing in gastroenterology. Ronald trained at Hahnemann University College of Medicine, graduating in 1988. According to Medicare claims data, Ronald cared for 1,406 Medicare patients across 9,971 services. The services billed most often include injection, vedolizumab, intravenous, 1 mg, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and removal of polyps or growths of large bowel using an endoscope with mechanical snare. This provider record is associated with NPI 1851399786.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (215) 257-5071
- Email not available
Practice Locations
817 LAWN AVE
Sellersville, PA 18960
Conditions Commonly Evaluated or Treated
Within Gastroenterology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Acid reflux
- Celiac disease
- Crohn's disease
- Hemorrhoids
- IBS
- Swallowing difficulties
- Ulcerative colitis
Biliary and pancreas
Colon and anorectal
Esophagus and swallowing
Functional bowel and motility
Liver
- Ascites
- Autoimmune hepatitis
- Cirrhosis
- Fatty liver disease
- Hemochromatosis
- Hepatitis B
- Hepatitis C
- Portal hypertension
Stomach and duodenum
Bowel & Colon
Digestive Symptoms
Gallbladder & Bile Ducts
Procedures & services
Most searched procedures
Lower endoscopy
Upper endoscopy
Capsule and physiology testing
Diagnostic Testing
Liver procedures
Treatments
Procedures Most Often Billed to Medicare
9,971 services · 1,406 patients · 20 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
254 | More than most peers in Gastroenterology |
| Removal of external hemorrhoids by rubber banding | Procedure | 46221 |
157 | More than most peers in Gastroenterology |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
135 | More often than most peers in Gastroenterology |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
49 | More often than most peers in Gastroenterology |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
39 | As often as other peers in Gastroenterology |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
14 | Less often than most peers in Gastroenterology |
| Diagnostic exam of anus using an endoscope | Procedure | 46600 |
13 | Less often than most peers in Gastroenterology |
| Dilation of esophagus | Procedure | 43450 |
13 | Less often than most peers in Gastroenterology |
| Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less | Treatment | 96365 |
31 | More often than most peers in Gastroenterology |
| Injection, vedolizumab, intravenous, 1 mg | Drug given | J3380 |
8,400 | More often than most peers in Gastroenterology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterologists at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 27 related providers in 4 groups
Other gastroenterologists in Sellersville 5
Same specialty, same city.
Trained at Hahnemann University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1988 at Hahnemann University College of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Removal of polyps or growths of large bowel using an endoscope with mechanical snare 7
Providers in PA who bill this service to Medicare most often.
Common questions
What is Dr. Markos's specialty?
Dr. Markos is a gastroenterologist in Sellersville, PA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Gastroenterology”.
NPI registry
Where can I find Dr. Markos?
Dr. Markos is listed at 817 Lawn Ave, Sellersville, PA 18960. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Markos?
The number on file is (215) 257-5071. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Markos's NPI number?
Dr. Markos's National Provider Identifier is 1851399786. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Markos's medical education?
Dr. Markos attended Hahnemann University College of Medicine, graduating in 1988. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Markos been practicing?
Dr. Markos has 38 years experience. Calculated from a graduation year of 1988, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Markos known for?
According to Medicare billing data, Dr. Markos performs procedures including removal of polyps or growths of large bowel using an endoscope with mechanical snare, removal of external hemorrhoids by rubber banding and biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope; provides treatments such as infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Markos confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Markos. If this is you, claiming it is free.
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