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DR. KEITH TIMOTHY FERGUSON M.D.
NPI 1861758526
Internal Medicine - Pulmonary Disease in Saint Louis, MO

Active since April 06, 2012PECOS EnrolledAccepts Medicare Assignment
3660 VISTA AVE, SAINT LOUIS, MO 63110(314) 977-6100(314) 977-6164 Get Directions Write a Review

NPPES record last updated: June 22, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 22, 2020, Jul 5, 2019, Jun 14, 2016 (3 updates tracked since 2016).

About Dr. Keith Timothy Ferguson M.d. NPPES

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

DR. KEITH TIMOTHY FERGUSON M.D. (NPI 1861758526) is an individual pulmonary disease provider in Saint Louis, Missouri, licensed in Missouri (2020013186) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, is affiliated with Ssm St Clare Health Center, and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1861758526
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameDR. KEITH TIMOTHY FERGUSONCredential: M.D.
Location Address3660 VISTA AVESaint Louis, MO 63110-2540
Mailing Address3635 Vista Ave Fl 7Saint Louis, MO 63110-2539 · (314) 577-8856 · Fax (314) 577-8859
Phone(314) 977-6100
Fax(314) 977-6164
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateApril 6, 2012
Last NPPES UpdateJune 22, 20203 updates tracked since enumeration
NPPES CertifiedJune 22, 2020
✔ NPI 1861758526 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
Licenses✔ Licensed in MO · 2020013186✔ Licensed in IL · 036140072✔ Licensed in WI · 61842-20
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 61842-20 (WI), 036140072 (IL), 2020013186 (MO)
3660 VISTA AVE, Saint Louis, MO 63110
Open in Google Maps ↗

Secondary Practice Location 1

Location 12315 Dougherty Ferry Rd Ste 211Saint Louis, MO 63122-3383 · Phone (314) 977-9600 · Fax (314) 977-9627

Other Identifiers 1

Medicaid1861758526WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.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. Keith Timothy Ferguson 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 ID4183857154
PECOS Enrollment IDI20200731001055
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 Keith Ferguson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ssm Health Care Group
0.2 mi
Internal Medicine
1225 SOUTH GRAND BLVD, 2L - DOOR 3,4
Saint Louis, MO 63104
  • Reassigned Medicare billing, Missouri enrollment
  • 1,294 clinicians in this Medicare group
NPI 1306589544 (314) 977-6100

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 11

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
109 services34 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.
68 services43 patients
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.
62 services33 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.
25 services15 patients
Test to measure expiratory airflow and volume changes before and after medication administration 94060
This procedure measures how air flows in and out of your lungs. It's done before and after medication to see if the treatment improves your breathing. It's a simple, non-invasive test that involves breathing into a device called a spirometer.
22 services22 patients
Test to determine lung volumes using sensors 94726
This test, called spirometry, measures lung capacity using sensors. You breathe into a mouthpiece attached to a device that records the amount and rate of air you inhale and exhale. It helps diagnose and monitor lung conditions.
22 services22 patients

Hospital Affiliations CMS Care Compare 3

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

Ssm St Clare Health Center

Acute Care Hospitals · Fenton, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260081
Location1015 BowlesFenton, MO 63026 · Jefferson County
Emergency services Birthing friendly

Ssm Health St Mary's Hospital - St Louis

Acute Care Hospitals · Richmond Heights, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260091
Location6420 Clayton RdRichmond Heights, MO 63117 · St. Louis County
Emergency services Birthing friendly

Ssm Health Saint Louis University Hospital

Acute Care Hospitals · Saint Louis, MO
1/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260105
Location3635 Vista AveSaint Louis, MO 63110 · St. Louis City County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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.

CHRISTINA TSAI
Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 977-6100
KRISTA L LENTINE MD,PHD
Internal Medicine (Nephrology)
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 977-8765
MARGARET M WILSON MD
Internal Medicine (Geriatric Medicine)
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 977-8462
DR. NANCY Z. DELANEY M.D.
Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 977-6100
DR. ESTHER A. GONZALEZ M.D.
Internal Medicine (Nephrology)
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 577-8765
CHRISTIAN HENDRIX
Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 977-6100
MARILYN A. MAXWELL M.D.
Internal Medicine
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 977-6100
HESSELBERG DRUG COMPANY
Pharmacy (Community/Retail Pharmacy)
3660 VISTA AVE
SAINT LOUIS, MO 63110
St. Louis City (314) 771-2900

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 Keith Ferguson's NPI number?

The NPI number for Keith Ferguson is 1861758526. It was assigned to this individual provider in the NPPES registry on April 6, 2012.

Where is Keith Ferguson located?

Keith Ferguson practices at 3660 Vista Ave, Saint Louis, MO 63110. The listed phone number is (314) 977-6100.

What is Keith Ferguson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Keith Ferguson enrolled in Medicare?

Yes. Keith Ferguson 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 organization bills Medicare for Keith Ferguson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Keith Ferguson reassigns Medicare benefits to Ssm Health Care Group (Saint Louis, MO). 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 Keith Ferguson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Keith Ferguson accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Keith Ferguson 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 Keith Ferguson affiliated with any hospitals?

According to CMS data, Keith Ferguson is affiliated with Ssm St Clare Health Center, Ssm Health St Mary's Hospital - St Louis and Ssm Health Saint Louis University Hospital.

When was this NPI record last updated?

The NPPES record for Keith Ferguson was last updated on June 22, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.