Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1972181188 Individual Practitioner Male Practitioner

Dr. Patrick Clarke Keller , MD

Hospitalist • Lake Forest, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Patrick Keller, MD is a certified Hospitalist practicing in Lake Forest, IL. With approximately 5 years of clinical experience since graduating from University Of Kentucky College Of Medicine in 2021, Dr. Keller delivers high-quality medical care to the local community at 1000 N WESTMORELAND RD.

Dr. Keller is affiliated with Northwestern Medical Faculty Foundation and accepts Medicare assignment.

Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, hospital discharge day management, more than, prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service);. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1000 N Westmoreland Rd

Lake Forest, IL 600451658

Telephone 8472345600
Fax 8475357203
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

University Of Kentucky College Of Medicine

Graduation Year

2021

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Hospitalist in Lake Forest, IL

Experienced Practitioner (5-10 Yrs)
Practitioner Clinical Experience
5 Yrs -7.7 yrs vs City Avg
City Avg: 12.7 Yrs
State Avg: 17.6 Yrs
Regional Practice Density
36 Specialists

Practicing in Lake Forest, IL (1537 Statewide)

Telehealth Adoption Rate
2.8% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
68.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Keller (5 Years) 5 Yrs
Lake Forest Specialty Average (12.7 Years) 12.7 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
203 90 $311.00 $120.61
99239 Hospital discharge day management, more than 30 minutes
87 86 $320.00 $116.34
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
69 40 $217.00 $80.19
G0316 Prolonged hospital inpatient or observation care evaluation and management service(s) beyond the total time for the primary service (when the primary service has been selected using time on the date of the primary service); each additional 15 minutes by th
28 11 $201.00 $30.74
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes
25 25 $613.00 $176.07

Medical Specialties & State Licenses

CMS Verified: 2025-09-26
Hospitalist Primary Specialty

NUCC Taxonomy Code: 208M00000X

State License IL 036167282

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Internal Medicine

NUCC Taxonomy Code: 207R00000X

State License IL 125077372

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.

Hospital & Practice Group Affiliations

Northwestern Medical Faculty Foundation

675 N St Clair, Chicago, IL 606115975

Phone: 3126958630

Secondary Practice Locations

915 N Grand Blvd

Saint Louis, MO 631061621

Phone: 3146524100

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
NPI 1013108059

Doctor of Medicine (M.D.), Master of Business Administration, Master of Public Health

NPI 1013327758

Doctor of Medicine (M.D.)

Kaitlin Mastalerz , PA-C

Physician Assistant

NPI 1023404886

Physician Assistant (Certified)

NPI 1023696499

Doctor of Medicine (M.D.)

NPI 1043770175

Doctor of Medicine (M.D.)

NPI 1053758029

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

11 Historical Events
📍
Updated Practice Location September 26, 2025

Registered at 1000 N WESTMORELAND RD, LAKE FOREST, IL 600451658 (Tel: 8472345600)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) September 26, 2025

Hospitalist (License #036167282 in IL)

📍
Updated Practice Location August 15, 2025

Registered at 915 N GRAND BLVD, SAINT LOUIS, MO 631061621 (Tel: 3146524100)

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) August 15, 2025

Student in an Organized Health Care Education/Training Program

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) June 16, 2021

Internal Medicine (License #125077372 in IL)

NPI Profile Active March 30, 2021

NPI status registered as active in NPPES database

📍
Updated Practice Location March 30, 2021

Registered at 251 E HURON ST, CHICAGO, IL 606113055 (Tel: 3129262000)

📍
Updated Business Mailing Address March 30, 2021

Registered at 251 E HURON ST, CHICAGO, IL 606113055 (Tel: 3129262000)

👤
Provider Name / Credentials Updated March 30, 2021

Recorded as PATRICK KELLER, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) March 30, 2021

Student in an Organized Health Care Education/Training Program

🟢
Initial NPI Registration & Enumeration March 30, 2021

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1972181188
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: March 30, 2021
Last Update: September 26, 2025
Sole Proprietor: No

Mailing Address

251 E Huron St

Chicago, IL 606113055

Phone: 3129262000

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.