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

MICHAEL WILLIAM NASH M.D.
NPI 1376577825
Family Medicine in Saint Louis, MO

Active since July 10, 2006PECOS Enrolled
3637 S GEYER RD, SAINT LOUIS, MO 63127(314) 525-1887(314) 525-1868 Get Directions Write a Review

NPPES record last updated: July 21, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 21, 2026, May 23, 2023, Nov 25, 2018 (3 updates tracked since 2018).

About Michael William Nash M.d. NPPES

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

MICHAEL WILLIAM NASH M.D. (NPI 1376577825) is an individual family medicine provider in Saint Louis, Missouri, licensed in Missouri (2017029652) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Jefferson, and maintains a secondary practice location in Washington.

NPPES Registry Identity

NPI1376577825
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameMICHAEL WILLIAM NASHCredential: M.D.
Location Address3637 S GEYER RDSaint Louis, MO 63127-1203
Mailing Address3637 S Geyer RdSaint Louis, MO 63127-1203 · (314) 525-1887 · Fax (314) 525-1868
Phone(314) 525-1887
Fax(314) 525-1868
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 2003
Enumeration DateJuly 10, 2006
Last NPPES UpdateJuly 21, 20263 updates tracked since enumeration
NPPES CertifiedJuly 21, 2026
✔ NPI 1376577825 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in MO · 2017029652✔ Licensed in IL · 036-115521
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
3637 S GEYER RD, Saint Louis, MO 63127
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Secondary Practice Location 1

Location 1901 Patients First Dr Ste 2742Washington, MO 63090-4700 · Phone (636) 239-8825 · Fax (636) 390-5595

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.Insurance ›

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

Michael William Nash 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 ID8325040942
PECOS Enrollment IDI20170907000777
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 9

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.

Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes 99305
An initial nursing facility visit per day is a service where a healthcare professional spends about 35 minutes assessing a patient's health status. This includes reviewing medical history, conducting a physical exam, and developing a care plan based on the patient's needs.
103 services94 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
71 services47 patients
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309
A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
63 services45 patients
Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349
An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.
36 services22 patients
Initial nursing facility care with moderate level of medical decision making, per day, if using time, at least 35 minutes 99305
An initial nursing facility visit per day is a service where a healthcare professional spends about 35 minutes assessing a patient's health status. This includes reviewing medical history, conducting a physical exam, and developing a care plan based on the patient's needs.
34 services33 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more 99308
A follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
18 services17 patients

Hospital Affiliations CMS Care Compare 3

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

Mercy Hospital Jefferson

Acute Care Hospitals · Festus, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260023
Location1400 Us Highway 61Festus, MO 63028 · Jefferson County
Emergency services

Christian Hospital Northeast

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260180
Location11133 Dunn RoadSaint Louis, MO 63136 · St. Louis County
Emergency services

Missouri Baptist Sullivan Hospital

Critical Access Hospitals · Sullivan, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number261337
Location751 Sappington Bridge RdSullivan, MO 63080 · Franklin County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63127 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
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.

Referred Medical Equipment & Supplies CMS DME claims 10

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Urinary catheter anchoring device, adhesive skin attachment, each A4333
DME-Orthotic Devices · category DF000N
1 supplier11 claims132 services$2.13 avg. paid by Medicare
Bedside drainage bag, day or night, with or without anti-reflux device, with or without tube, each A4357
DME-Orthotic Devices · category DF000N
1 supplier12 claims12 services$9.34 avg. paid by Medicare
Walker, folding, wheeled, adjustable or fixed height E0143
DME-Other DME · category DE000N
5 suppliers17 claims17 services$43.00 avg. paid by Medicare
Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
2 suppliers12 claims12 services$35.82 avg. paid by Medicare
Humidifier, heated, used with positive airway pressure device E0562
DME-Other DME · category DE001N
2 suppliers14 claims14 services$9.58 avg. paid by Medicare
Nebulizer, with compressor E0570
DME-Other DME · category DE000N
2 suppliers16 claims16 services$1.96 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

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

SIRISHA VADDI BROSCH M.D.
Internal Medicine
3637 S GEYER RD
SAINT LOUIS, MO 63127
St. Louis County (314) 525-1887
CHISOM EZE MD
Internal Medicine
3637 S GEYER RD
SAINT LOUIS, MO 63127
St. Louis County (314) 525-1887
MING HAO M.D.
Family Medicine (Geriatric Medicine)
3637 S GEYER RD
SAINT LOUIS, MO 63127
St. Louis County (314) 251-4659

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 Michael Nash's NPI number?

The NPI number for Michael Nash is 1376577825. It was assigned to this individual provider in the NPPES registry on July 10, 2006.

Where is Michael Nash located?

Michael Nash practices at 3637 S Geyer Rd, Saint Louis, MO 63127. The listed phone number is (314) 525-1887.

What is Michael Nash's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Michael Nash enrolled in Medicare?

Yes. Michael Nash 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.

What insurance does Michael Nash accept?

Health plans from Medica list Michael Nash 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 Michael Nash affiliated with any hospitals?

According to CMS data, Michael Nash is affiliated with Mercy Hospital Jefferson, Christian Hospital Northeast and Missouri Baptist Sullivan Hospital.

When was this NPI record last updated?

The NPPES record for Michael Nash was last updated on July 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.