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DR. GREGORY WILLIAM RUHNKE M.D.
NPI 1679541395
Internal Medicine in Boston, MA

Active since March 09, 2006PECOS EnrolledAccepts Medicare Assignment
97.71/100
CMS Quality Rating
15 PARKMAN STREET WAC 108, MEDICAL WALK IN UNIT, BOSTON, MA 02114(617) 726-2707 Get Directions Write a Review

NPPES record last updated: September 2, 2008. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Gregory William Ruhnke M.d. NPPES

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

DR. GREGORY WILLIAM RUHNKE M.D. (NPI 1679541395) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (210234) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, is affiliated with Ingalls Memorial Hospital, and is a graduate of Stanford University School Of Medicine (1998).

NPPES Registry Identity

NPI1679541395
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. GREGORY WILLIAM RUHNKECredential: M.D.
Location Address15 PARKMAN STREET WAC 108, MEDICAL WALK IN UNITBoston, MA 02114-3117
Mailing Address5841 South Maryland Avenue, University Of Chicago Medical CenterChicago, IL 60637-2007 · (773) 702-5212 · Fax (773) 702-1295
Phone(617) 726-2707
Sole ProprietorNo
Medical School CMSStanford University School Of MedicineGraduated 1998
Enumeration DateMarch 9, 2006
Last NPPES UpdateSeptember 2, 2008
✔ NPI 1679541395 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 210234
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
15 PARKMAN STREET WAC 108, Boston, MA 02114
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Other Identifiers 5

Medicare UPINH48690
Medicare ID-Type UnspecifiedA33051MA
Medicaid0143235MA
Other210964MA · Tufts Health Plan
OtherJ23727MA · Bcbs Ma

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, Taro Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Gregory William Ruhnke 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 ID1759317118
PECOS Enrollment IDI20090225000145
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Gregory Ruhnke reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The University Of Chicago Medical Center
850 mi
General Acute Care Hospital
5841 S MARYLAND AVE
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 1,905 clinicians in this Medicare group
NPI 1033218128 (773) 702-1530
University Of Chicago
850 mi
Multi-Specialty
5841 S MARYLAND AVE, UCPG/MC 1099
Chicago, IL 60637
  • Reassigned Medicare billing, Illinois enrollment
  • 2,237 clinicians in this Medicare group
NPI 1821048786 (773) 702-9200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
139 services49 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.
71 services70 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
33 services33 patients

Hospital Affiliations CMS Care Compare

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

Ingalls Memorial Hospital

Acute Care Hospitals · Harvey, IL
2/5 CMS rating
OwnershipPhysician
CMS Certification Number140191
Location1 Ingalls DriveHarvey, IL 60426 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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.

97.71/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality75.43
Promoting Interoperability100
Improvement Activities40

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 Gregory Ruhnke's NPI number?

The NPI number for Gregory Ruhnke is 1679541395. It was assigned to this individual provider in the NPPES registry on March 9, 2006.

Where is Gregory Ruhnke located?

Gregory Ruhnke practices at 15 Parkman Street Wac 108 Medical Walk In Unit, Boston, MA 02114. The listed phone number is (617) 726-2707.

What is Gregory Ruhnke's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Gregory Ruhnke enrolled in Medicare?

Yes. Gregory Ruhnke 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.

Which organizations bill Medicare for Gregory Ruhnke's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Ruhnke reassigns Medicare benefits to 2 organizations: The University Of Chicago Medical Center (Chicago, IL) and University Of Chicago (Chicago, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Gregory Ruhnke's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Ruhnke accept?

Health plans from Oscar Health and Taro Health list Gregory Ruhnke 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 Gregory Ruhnke affiliated with any hospitals?

According to CMS data, Gregory Ruhnke is affiliated with Ingalls Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Ruhnke was last updated on September 2, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.