Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

PATRICK CLARKE KELLER MD
NPI 1972181188
Hospitalist in Saint Louis, MO

Q: What is Patrick Keller's NPI number?

The NPI number for Patrick Keller is 1972181188. It was assigned to this individual provider in the NPPES registry on March 30, 2021.

Q: What is Patrick Keller's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for Patrick Keller was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.

Active since March 30, 2021PECOS Enrolled

915 N GRAND BLVD, SAINT LOUIS, MO 63106(314) 652-4100 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 29, 2026, Aug 15, 2025, Jun 16, 2021 and 1 more (4 updates tracked since 2021).

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About Patrick Clarke Keller Md NPPES

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

PATRICK CLARKE KELLER MD (NPI 1972181188) is an individual hospitalist provider in Saint Louis, Missouri, licensed in Illinois (036167282) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS and maintains a secondary practice location in Lake Forest.

NPPES Registry Identity

NPI1972181188

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NamePATRICK CLARKE KELLERCredential: MD

Location Address915 N GRAND BLVDSaint Louis, MO 63106-1621

Mailing Address915 N Grand BlvdSaint Louis, MO 63106-1621 · (314) 652-4100

Phone(314) 652-4100

Sole ProprietorNo

Enumeration DateMarch 30, 2021

Last NPPES UpdateSeptember 29, 20264 updates tracked since enumeration

NPPES CertifiedSeptember 29, 2026

✔ NPI 1972181188 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in IL · 036167282

Definition

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.

Also ListedInternal MedicineTaxonomy 207R00000X · License 125077372 (IL)

915 N GRAND BLVD, Saint Louis, MO 63106

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Secondary Practice Location 1

Location 11000 N Westmoreland RdLake Forest, IL 60045-1658 · Phone (847) 234-5600 · Fax (847) 535-7203

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Patrick Clarke Keller Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignment

Medicare enrollment records show Patrick Keller reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Northwestern Medical Faculty Foundation

257 mi

Multi-Specialty

DEPT 5777
Carol Stream, IL 60122

Reassigned Medicare billing, Illinois enrollment
4,817 clinicians in this Medicare group

NPI 1346235314 (855) 694-2866

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 4

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.

203 services90 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.

87 services86 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

69 services40 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

25 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63106 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

$128.28 typical visit price

range $55.65 – $169.38

Typical copayment $32.07 (range $13.91 – $42.34)

Most-billed visit code 99204

Established Patient

$98.37 typical visit price

range $17.76 – $137.92

Typical copayment $24.59 (range $4.44 – $34.48)

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 20

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

DR. MATTHEW CHRISTOPHER SIMPSON O.D.

Optometrist

915 N GRAND BLVD
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4100

MS. CHARMIN MEYATTA GIBSON M.S.W.

Social Worker

915 N GRAND BLVD
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4110

CONOR MCCARTNEY M.D.

Internal Medicine

915 N GRAND BLVD
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4100

STEPHANIE ADAMS

Registered Nurse

915 N GRAND BLVD
SAINT LOUIS, MO 63106

St. Louis City (314) 289-7676

NAGLA ABDELMALEK M.D.

Emergency Medicine

915 N GRAND BLVD
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4100

DR. JAMES MICHAEL HASIK DDS

Dentist (General Practice)

915 N GRAND BLVD, DENTAL CLINIC
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4100

MS. TRACY LANES CRNA

Nurse Anesthetist, Certified Registered

915 N GRAND BLVD
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4100

MS. KRISTY LYNNE WILDT PA-C

Physician Assistant

915 N GRAND BLVD, JOHN COCHRAN VETERANS ADMINISTRATION MEDICAL CENTER
SAINT LOUIS, MO 63106

St. Louis City (314) 652-4100

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 Patrick Keller's NPI number?

The NPI number for Patrick Keller is 1972181188. It was assigned to this individual provider in the NPPES registry on March 30, 2021.

Where is Patrick Keller located?

Patrick Keller practices at 915 N Grand Blvd, Saint Louis, MO 63106. The listed phone number is (314) 652-4100.

What is Patrick Keller's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Is Patrick Keller enrolled in Medicare?

Yes. Patrick Keller is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Patrick Keller's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Patrick Keller reassigns Medicare benefits to Northwestern Medical Faculty Foundation (Carol Stream, IL). The 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 Patrick Keller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Patrick Keller was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.