HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / MO

KEMIN CHEN, PA

PHYSICIAN ASSISTANT

Graduated: 2014

NPI: 1326278102

Practice Locations (15)

MERCY EAST AMBULATORY SERVICES LLC

8321 MARYLAND AVE

CLAYTON, MO 631053644

3146268010

MERCY EAST AMBULATORY SERVICES LLC

11445 OLIVE BLVD

CREVE COEUR, MO 631417108

3144289543

MERCY EAST AMBULATORY SERVICES LLC

20 THE LEGENDS PKWY

EUREKA, MO 630253823

6365498509

MERCY EAST AMBULATORY SERVICES LLC

676 GRAVOIS BLUFFS BLVD, SUITE A1

FENTON, MO 630267742

6364922245

MERCY EAST AMBULATORY SERVICES LLC

3433 N HWY 67

FLORISSANT, MO 630331647

3147204381

TATYANA PETROSOVA MD PC

100 MEDICAL PLZ

LAKE SAINT LOUIS, MO 633671366

6366255200

MERCY EAST AMBULATORY SERVICES LLC

409 LAFAYETTE CTR

MANCHESTER, MO 630113943

6367070764

MERCY EAST AMBULATORY SERVICES LLC

2991 HWY K

O FALLON, MO 633687862

6364352333

TATYANA PETROSOVA MD PC

300 1ST CAPITOL DR

SAINT CHARLES, MO 633012844

3147683450

MERCY EAST AMBULATORY SERVICES LLC

4260 HAMPTON AVE

SAINT LOUIS, MO 631092119

3142826323

MERCY EAST AMBULATORY SERVICES LLC

2015 MAPLEWOOD COMMONS DR

SAINT LOUIS, MO 631431003

3142934023

TATYANA PETROSOVA MD PC

10420 OLD OLIVE ST RD, SUITE 305

SAINT LOUIS, MO 631415914

3147977074

MERCY EAST AMBULATORY SERVICES LLC

39 SILO DR

UNION, MO 630844917

6362343022

MERCY EAST AMBULATORY SERVICES LLC

555 WASHINGTON SQ

WASHINGTON, MO 630905343

6363901777

MERCY EAST AMBULATORY SERVICES LLC

1111 W PEARCE BLVD

WENTZVILLE, MO 633851020

6368565363

Source: CMS National Downloadable File, September 2026.