MARGARET JANE BLAYNEY MD
NPI 1629413018
Internal Medicine - Gastroenterology in East Lansing, MI

Active since April 30, 2013PECOS EnrolledAccepts Medicare Assignment
1650 RAMBLEWOOD DR STE 100, EAST LANSING, MI 48823(517) 332-1200(517) 351-7122 Get Directions Write a Review

NPPES record last updated: March 3, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Mar 3, 2026, Jan 30, 2020, Oct 7, 2019 and 1 more (4 updates tracked since 2016).

About Margaret Jane Blayney Md NPPES

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

MARGARET JANE BLAYNEY MD (NPI 1629413018) is an individual gastroenterology provider in East Lansing, Michigan, licensed in Michigan (4301500792) and active in the NPI registry since April 2013. She is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health System, and maintains a secondary practice location in Ann Arbor.

NPPES Registry Identity

NPI1629413018
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameMARGARET JANE BLAYNEYCredential: MD
Location Address1650 RAMBLEWOOD DR STE 100East Lansing, MI 48823-7396
Mailing Address3621 S State StAnn Arbor, MI 48108-1633 · (734) 647-5299
Fax(517) 351-7122
Sole ProprietorNo
Medical School CMSUniversity Of Michigan Medical SchoolGraduated 2013
Enumeration DateApril 30, 2013
Last NPPES UpdateMarch 3, 20264 updates tracked since enumeration
NPPES CertifiedMarch 3, 2026
NPI 1629413018 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 MI · 4301500792
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.

1650 RAMBLEWOOD DR STE 100, East Lansing, MI 48823

Secondary Practice Location 1

Location 11500 E Medical Center DrAnn Arbor, MI 48109-5000 · Phone (734) 936-4000

Accepted 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

Margaret Jane Blayney 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 ID8123269354
PECOS Enrollment IDI20191029001453
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 10

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 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.
52 services47 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.
31 services31 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.
31 services29 patients
Test for tone and sensation of rectum and anus 91120
This procedure checks the health of the lower digestive tract. The doctor gently examines the area to assess its muscle strength and sensitivity. This helps in detecting any abnormal conditions. It's a standard, safe procedure with minimal discomfort.
24 services24 patients
Study of rectum sensitivity and function 91122
This procedure examines the rectum's sensitivity and functionality. It involves a small, soft balloon inserted into the rectum and inflated to various degrees. The goal is to assess how well your rectum can sense and respond to different volumes. It's a crucial test for diagnosing certain digestive issues.
24 services24 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
20 services18 patients

Hospital Affiliations CMS Care Compare

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

University Of Michigan Health System

Acute Care Hospitals · Ann Arbor, MI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230046
Location1500 E Medical Center Drive, Spc 5474Ann Arbor, MI 48109 · Washtenaw County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48823 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
$126.15 typical visit price
range $54.34 – $166.68
Typical copayment $31.53 (range $13.58 – $41.67)
Most-billed visit code 99204
Established Patient
$96.44 typical visit price
range $17.09 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
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 7

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

Nurse Practitioner
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823
Internal Medicine (Gastroenterology)
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823
Internal Medicine (Gastroenterology)
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823
Internal Medicine (Gastroenterology)
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823
Physician Assistant
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823
Internal Medicine (Gastroenterology)
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823
Physician Assistant
1650 RAMBLEWOOD DR STE 100
EAST LANSING, MI 48823

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 Margaret Blayney's NPI number?

The NPI number for Margaret Blayney is 1629413018. It was assigned to this individual provider in the NPPES registry on April 30, 2013.

Where is Margaret Blayney located?

Margaret Blayney practices at 1650 Ramblewood Dr Ste 100, East Lansing, MI 48823. The listed phone number is (517) 332-1200.

What is Margaret Blayney's specialty?

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

Is Margaret Blayney enrolled in Medicare?

Yes. Margaret Blayney 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 Margaret Blayney accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Margaret Blayney 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 Margaret Blayney affiliated with any hospitals?

According to CMS data, Margaret Blayney is affiliated with University Of Michigan Health System.

When was this NPI record last updated?

The NPPES record for Margaret Blayney was last updated on March 3, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.