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SHAHID B. ILAHI M.D.
NPI 1508867078
Internal Medicine in Lake Barrington, IL

Active since August 09, 2005PECOS EnrolledAccepts Medicare Assignment
22N285 PEPPER RD, SUITE 303, LAKE BARRINGTON, IL 60010(630) 952-1412 Get Directions Write a Review

NPPES record last updated: December 16, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Dec 16, 2025, May 10, 2021 (2 updates tracked since 2021).

About Shahid B. Ilahi M.d. NPPES

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

SHAHID B. ILAHI M.D. (NPI 1508867078) is an individual internal medicine provider in Lake Barrington, Illinois, licensed in Illinois (036081783) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Memorial Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1508867078
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameSHAHID B. ILAHICredential: M.D.
Location Address22N285 PEPPER RD, SUITE 303Lake Barrington, IL 60010-5982
Mailing AddressPo Box 19639Springfield, IL 62794-9639 · (217) 545-8000
Phone(630) 952-1412
Sole ProprietorNo
Medical School CMSOtherGraduated 1982
Enumeration DateAugust 9, 2005
Last NPPES UpdateDecember 16, 20252 updates tracked since enumeration
NPPES CertifiedDecember 16, 2025
✔ NPI 1508867078 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036081783
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.
Also ListedInternal Medicine · GastroenterologyTaxonomy 207RG0100X · License 0036081783 (IL)
22N285 PEPPER RD, Lake Barrington, IL 60010
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Secondary Practice Locations 2

Location 1875 South Route 31Crystal Lake, IL 60014-8190 · Phone (779) 220-5500
Location 2315 W Carpenter St Fl 1Springfield, IL 62702-4901 · Phone (217) 545-8000

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

Shahid B. Ilahi 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 ID3870571938
PECOS Enrollment IDI20040713001539
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

6

Medicare enrollment records show Shahid Ilahi reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Shahid Ilahi MD Sc
0.1 mi
Internal Medicine
22285 N PEPPER RD STE 303
Lake Barrington, IL 60010
  • Reassigned Medicare billing, Illinois enrollment
  • 4 clinicians in this Medicare group
NPI 1629077086 (847) 842-0757
George N Atia, M.D., S.C.
0.9 mi
Gastroenterology
200 FOX GLEN CT
Barrington, IL 60010
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: George N Atia MD Sc
  • 28 clinicians in this Medicare group
NPI 1730214271 (847) 382-7165
Gi Partners Of Illinois, PLLC
12 mi
Gastroenterology
1880 W WINCHESTER RD, #201
Libertyville, IL 60048
  • Reassigned Medicare billing, Illinois enrollment
  • 74 clinicians in this Medicare group
NPI 1548613995 (847) 247-0187
Alliance Gastroenterology Group LLC
13 mi
Gastroenterology
1795 N BUTTERFIELD RD STE 201
Libertyville, IL 60048
  • Reassigned Medicare billing, Illinois enrollment
NPI 1215759501 (847) 500-9380
Mercy Health System Corporation
55 mi
Multi-Specialty
580 N WASHINGTON ST
Janesville, WI 53548
  • Reassigned Medicare billing, Illinois enrollment
  • 671 clinicians in this Medicare group
NPI 1598718603 (608) 741-7630
Siu Physicians & Surgeons, Inc
181 mi
Endocrinology, Diabetes & Metabolism
201 E MADISON ST STE 328
Springfield, IL 62702
  • Reassigned Medicare billing, Illinois enrollment
  • 645 clinicians in this Medicare group
NPI 1558385989 (217) 545-8000

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 8

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.
205 services134 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.
62 services62 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.
57 services55 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.
52 services52 patients
Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery 45384
This procedure involves using a flexible tube with a camera, called an endoscope, to view the large intestine. If any abnormal growths or polyps are found, they are removed with an electrically-heated instrument. This is a common way to prevent bowel issues.
46 services46 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.
41 services41 patients

Hospital Affiliations CMS Care Compare 2

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

Advocate Good Shepherd Hospital

Acute Care Hospitals · Barrington, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140291
Location450 West Highway 22Barrington, IL 60010 · Lake County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60010 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
$137.43 typical visit price
range $59.81 – $181.38
Typical copayment $34.35 (range $14.95 – $45.34)
Most-billed visit code 99204
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
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 5

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

DR. DAVID J CRANDALL M.D.
Obstetrics & Gynecology
22N285 PEPPER RD, SUITE #111
LAKE BARRINGTON, IL 60010
Cook County (847) 382-7330
DR. THOMAS J MEYER M.D.
Obstetrics & Gynecology
22N285 PEPPER RD, SUITE #111
LAKE BARRINGTON, IL 60010
Cook County (847) 382-7330
LAKE BARRINGTON WOMENS HEALTH CENTER PC
Specialist
22N285 PEPPER RD, SUITE 111
LAKE BARRINGTON, IL 60010
Cook County (847) 382-7330
BARRINGTON SPECIALISTS IN ADULT MEDICINE
Specialist
22N285 PEPPER RD, SUITE 407
LAKE BARRINGTON, IL 60010
Cook County (847) 382-6633
DR. DEREK C ARCHER M.D.
Radiology (Body Imaging)
22N285 PEPPER RD, SUITE #103
LAKE BARRINGTON, IL 60010
Cook County (847) 732-2739

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 Shahid Ilahi's NPI number?

The NPI number for Shahid Ilahi is 1508867078. It was assigned to this individual provider in the NPPES registry on August 9, 2005.

Where is Shahid Ilahi located?

Shahid Ilahi practices at 22n285 Pepper Rd Suite 303, Lake Barrington, IL 60010. The listed phone number is (630) 952-1412.

What is Shahid Ilahi's specialty?

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

Is Shahid Ilahi enrolled in Medicare?

Yes. Shahid Ilahi 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 Shahid Ilahi's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Shahid Ilahi reassigns Medicare benefits to 6 organizations: Shahid Ilahi MD Sc (Lake Barrington, IL), George N Atia, M.D., S.C. (Barrington, IL), Gi Partners Of Illinois, PLLC (Libertyville, IL), Alliance Gastroenterology Group LLC (Libertyville, IL), Mercy Health System Corporation (Janesville, WI) and 1 more organization, listed in the Medicare section above. 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 Shahid Ilahi's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Shahid Ilahi affiliated with any hospitals?

According to CMS data, Shahid Ilahi is affiliated with Memorial Medical Center and Advocate Good Shepherd Hospital.

When was this NPI record last updated?

The NPPES record for Shahid Ilahi was last updated on December 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.