DR. FREDERICK W RUYMANN MD
NPI 1568466316
Internal Medicine - Gastroenterology in Cambridge, MA

Q: What is Frederick Ruymann's NPI number?

The NPI number for Frederick Ruymann is 1568466316. It was assigned to this individual provider in the NPPES registry on June 9, 2005.

Q: What is Frederick Ruymann'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 Frederick Ruymann was last updated on January 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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 June 09, 2005PECOS EnrolledAccepts Medicare Assignment

79.84/100

CMS Quality Rating

300 MOUNT AUBURN ST, STE 405, CAMBRIDGE, MA 02138(617) 661-0221(617) 661-3862 Get Directions Write a Review

NPPES record last updated: January 11, 2012. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Dr. Frederick W Ruymann Md NPPES

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

DR. FREDERICK W RUYMANN MD (NPI 1568466316) is an individual gastroenterology provider in Cambridge, Massachusetts, licensed in Massachusetts (71422) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS, is affiliated with Cape Cod Hospital, and is a graduate of Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University (1987).

NPPES Registry Identity

NPI1568466316

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. FREDERICK W RUYMANNCredential: MD

Location Address300 MOUNT AUBURN ST, STE 405Cambridge, MA 02138-5665

Mailing Address300 Mount Auburn St, Ste 405Cambridge, MA 02138-5502 · (617) 661-0221 · Fax (617) 661-3862

Phone(617) 661-0221

Fax(617) 661-3862

Sole ProprietorYes

Medical School CMSClvlnd Clinic Lerner College Of Med Of Case Wstn Rsv UniversityGraduated 1987

Enumeration DateJune 9, 2005

Last NPPES UpdateJanuary 11, 2012

✔ NPI 1568466316 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 MA · 71422

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.

300 MOUNT AUBURN ST, Cambridge, MA 02138

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Other Identifiers 3

Medicaid3052788MA

Medicare UPINE17583MA

Medicare PINJ0894302MA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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. Frederick W Ruymann Md 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 ID2961459573

PECOS Enrollment IDI20050406000259

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 21

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.

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.

232 services179 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.

138 services133 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.

136 services130 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.

78 services72 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

71 services70 patients

Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 43264

This procedure, called an endoscopic retrograde cholangiopancreatography (ERCP), involves using a flexible tube with a camera (endoscope) to locate and remove stones or debris from your bile or pancreatic duct. It's a non-surgical method to clear the ducts, enhancing your digestive health.

64 services62 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.

51 services50 patients

Incision of pancreatic outlet using a flexible endoscope 43262

This procedure involves a small cut in the outlet of the pancreas using a flexible tube with a camera, called an endoscope. It helps doctors diagnose and treat conditions affecting the pancreas, enhancing patient comfort and recovery.

39 services39 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.

38 services38 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.

38 services38 patients

Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43255

This procedure involves using a flexible tube with a light, called an endoscope, to examine and treat bleeding in the esophagus, stomach, or upper small bowel. It's a safe, effective way to control bleeding and ensure your digestive health.

25 services23 patients

Insertion of stent into pancreatic or bile duct using a flexible endoscope 43274

This procedure involves the placement of a tiny tube, known as a stent, into your pancreatic or bile duct. A flexible endoscope, a long, thin instrument with a light and camera, is used. It aids in relieving blockages and improving flow in these ducts.

24 services23 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.

24 services24 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

23 services20 patients

Balloon dilation of pancreatic or bile duct or sphincter using a flexible endoscope 43277

Balloon dilation is a procedure where a tiny balloon is inserted via an endoscope into your pancreatic or bile duct. The balloon is then inflated to widen the duct, improving flow and relieving blockages. It's a non-surgical, minimally invasive procedure.

20 services19 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.

19 services13 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

18 services18 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

17 services17 patients

Imaging of digestive tract done from the inside of the digestive tract 91110

This procedure, known as an endoscopy, involves a small camera being passed into the digestive tract. It helps doctors to see the inside of your digestive system in detail. This can aid in diagnosing conditions or planning treatments. It's generally safe and can provide valuable information.

15 services15 patients

Diagnostic exam of gallbladder and pancreatic, liver, and bile ducts using an endoscope 43260

This procedure, known as an ERCP, involves using a flexible tube with a camera, called an endoscope, to examine your gallbladder, pancreas, liver, and bile ducts. It can detect issues like blockages or diseases. You'll be sedated for comfort.

13 services13 patients

Control of bleeding of upper large bowel using a flexible endoscope 45382

This procedure involves using a flexible endoscope, a thin tube with a light and camera, to view and control bleeding in the upper large bowel. Special tools can be passed through the endoscope to stop the bleeding. It's a minimally invasive way to address this issue.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

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

Cape Cod Hospital

Acute Care Hospitals · Hyannis, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220012

Location27 Park StreetHyannis, MA 02601 · Barnstable County

Emergency services Birthing friendly

Falmouth Hospital

Acute Care Hospitals · Falmouth, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220135

Location67 & 100 Ter Heun DriveFalmouth, MA 02540 · Barnstable County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02138 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

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

79.84/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

63.36

Promoting Interoperability

100

Improvement Activities

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.

DR. MARGARET LOVE MCLAUGHLIN M.D.

Internal Medicine (Nephrology)

300 MOUNT AUBURN ST, SUITE 515
CAMBRIDGE, MA 02138

Middlesex County (617) 864-1571

RODERICK H CROCKER JR. MD

Urology

300 MOUNT AUBURN ST, STE 519
CAMBRIDGE, MA 02138

Middlesex County (617) 547-4400

DR. THOMAS CAUGHEY MD

Internal Medicine (Hematology & Oncology)

300 MOUNT AUBURN ST, HEMA/ONC
CAMBRIDGE, MA 02138

Middlesex County (617) 497-9646

MISS JOANNE BRUNY NP

Nurse Practitioner (Family)

300 MOUNT AUBURN ST
CAMBRIDGE, MA 02138

Middlesex County (617) 492-3500

CAMBRIDGE OTOLARYNGOLOGY

Otolaryngology

300 MOUNT AUBURN ST, SUITE 308
CAMBRIDGE, MA 02138

Middlesex County (617) 354-1010

KAREN L AHLERT M.D.

Surgery

300 MOUNT AUBURN ST, SUITE 407
CAMBRIDGE, MA 02138

Middlesex County (617) 868-7456

DR. SHILPA JOSHI DESAI MD

Ophthalmology

300 MOUNT AUBURN ST
CAMBRIDGE, MA 02138

Middlesex County (617) 499-5571

DR. JULIO C. AYALA MD

Internal Medicine (Gastroenterology)

300 MOUNT AUBURN ST
CAMBRIDGE, MA 02138

Middlesex County (617) 499-0026

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 Frederick Ruymann's NPI number?

The NPI number for Frederick Ruymann is 1568466316. It was assigned to this individual provider in the NPPES registry on June 9, 2005.

Where is Frederick Ruymann located?

Frederick Ruymann practices at 300 Mount Auburn St Ste 405, Cambridge, MA 02138. The listed phone number is (617) 661-0221.

What is Frederick Ruymann's specialty?

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

Is Frederick Ruymann enrolled in Medicare?

Yes. Frederick Ruymann 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 Frederick Ruymann accept?

Health plans from Anthem Blue Cross and Blue Shield list Frederick Ruymann 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 Frederick Ruymann affiliated with any hospitals?

According to CMS data, Frederick Ruymann is affiliated with Cape Cod Hospital and Falmouth Hospital.

When was this NPI record last updated?

The NPPES record for Frederick Ruymann was last updated on January 11, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.