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JOHN MARK FLACK MD, MPH
NPI 1164450987
Internal Medicine - Hypertension Specialist in Springfield, IL

Active since June 29, 2006PECOS EnrolledAccepts Medicare Assignment
751 N RUTLEDGE ST, SUITE 1100, SPRINGFIELD, IL 62702(217) 545-8000(217) 545-4735 Get Directions Write a Review

NPPES record last updated: October 21, 2020. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Oct 21, 2020, Oct 2, 2018 (2 updates tracked since 2018).

About John Mark Flack Md, Mph NPPES

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

JOHN MARK FLACK MD, MPH (NPI 1164450987) is an individual hypertension specialist in Springfield, Illinois, licensed in Illinois (036-138254) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Memorial Medical Center, and is a graduate of Other (1982).

NPPES Registry Identity

NPI1164450987
Entity TypeIndividualMale
Primary Taxonomy207RH0005X
Provider Legal NameJOHN MARK FLACKCredential: MD, MPH
Location Address751 N RUTLEDGE ST, SUITE 1100Springfield, IL 62702-4968
Mailing AddressPo Box 19636Springfield, IL 62794-9636 · (217) 545-8000 · Fax (217) 545-4735
Phone(217) 545-8000
Fax(217) 545-4735
Sole ProprietorNo
Medical School CMSOtherGraduated 1982
Enumeration DateJune 29, 2006
Last NPPES UpdateOctober 21, 20202 updates tracked since enumeration
NPPES CertifiedOctober 21, 2020
✔ NPI 1164450987 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hypertension SpecialistAllopathic & Osteopathic Physicians
Taxonomy Code207RH0005X
License✔ Licensed in IL · 036-138254
Definition
A Hypertension Specialist is a physician who concentrates on all aspects of the diagnosis and treatment of hypertension.
Also ListedInternal MedicineTaxonomy 207R00000X · License 036-138254 (IL)
751 N RUTLEDGE ST, Springfield, IL 62702
Open in Google Maps ↗

Other Identifiers 1

Medicaid036138254IL

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

John Mark Flack Md, Mph 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 ID2264344688
PECOS Enrollment IDI20150819007418
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 2

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.

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.
22 services22 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.
22 services18 patients

Hospital Affiliations CMS Care Compare

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

Memorial Medical Center

Acute Care Hospitals · Springfield, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140148
Location701 N First StSpringfield, IL 62702 · Sangamon County
Emergency services Birthing friendly

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.

ZACHARIAH GURNSEY MD
Internal Medicine
751 N RUTLEDGE ST, STE 1100
SPRINGFIELD, IL 62702
Sangamon County (217) 545-0182
CATHERINE A NARITOKU R.D.
Dietitian, Registered
751 N RUTLEDGE ST, LOWER LEVEL
SPRINGFIELD, IL 62702
Sangamon County (217) 545-0182
MRS. LUCINDA S BUESCHER M.D.
Dermatology
751 N RUTLEDGE ST
SPRINGFIELD, IL 62702
Sangamon County (217) 545-3821
JAMES M GILCHRIST MD
Psychiatry & Neurology (Clinical Neurophysiology)
751 N RUTLEDGE ST, STE 3100
SPRINGFIELD, IL 62702
Sangamon County (217) 545-8000
DR. AKSHRA VERMA MD, MS
Internal Medicine
751 N RUTLEDGE ST, STE 1100
SPRINGFIELD, IL 62702
Sangamon County (217) 545-0182
CYNTHIA A MICHAEL MD
Internal Medicine (Pulmonary Disease)
751 N RUTLEDGE ST
SPRINGFIELD, IL 62702
Sangamon County (217) 545-8000
TILITHA S SHAWGO
Clinical Nurse Specialist (Acute Care)
751 N RUTLEDGE ST
SPRINGFIELD, IL 62702
Sangamon County (217) 545-4421
REBECCA J LARSON MD
Dermatology (MOHS-Micrographic Surgery)
751 N RUTLEDGE ST, SUITE 2300
SPRINGFIELD, IL 62702
Sangamon County (217) 545-8000

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 John Flack's NPI number?

The NPI number for John Flack is 1164450987. It was assigned to this individual provider in the NPPES registry on June 29, 2006.

Where is John Flack located?

John Flack practices at 751 N Rutledge St Suite 1100, Springfield, IL 62702. The listed phone number is (217) 545-8000.

What is John Flack's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hypertension Specialist, with taxonomy code 207RH0005X.

Is John Flack enrolled in Medicare?

Yes. John Flack 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.

Is John Flack affiliated with any hospitals?

According to CMS data, John Flack is affiliated with Memorial Medical Center.

When was this NPI record last updated?

The NPPES record for John Flack was last updated on October 21, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.