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General Surgery

Loren N. Bach, MD

Works at hospitals in Saint Louis, MO · Washington, MO · Chesterfield, MO · Missouri

Summary

Dr. Loren N. Bach, MD is a general surgeon at 12788 Olive Blvd, Creve Coeur, MO 63141. Phone: (314) 569-6440. Accepts Medicare assignment. In 2024, Loren N. Bach had 182 Original Medicare patients and 369 services. NPI 1205279650. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: General surgeon (Medicare lists General Surgery)
  • Address: 12788 Olive Blvd, Creve Coeur, MO 63141 · Directions (1 more location)
  • Phone: (314) 569‑6440
  • Medicare: Accepts Medicare assignment
  • Hospitals: Mercy Hospital St Louis, Mercy Hospital Washington, St Lukes Hospital
  • Group practice: Elite Physical Therapy of Creve Coeur LLC (+1 more)
  • Medical school: University Of Minnesota Medical School · graduated 2013 (13 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Loren N. Bach, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Loren N. Bach accept Medicare assignment?
Yes. Medicare's clinician data says Loren N. Bach accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Loren N. Bach see?
In 2024, CMS data shows 182 Original Medicare patients and 369 services for Loren N. Bach. This counts Original Medicare only and measures volume, not quality.
What is Loren N. Bach's NPI number?
1205279650. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Loren N. Bach, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients182
Services billed to Medicare369
Different services or procedures51
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)86 services
  2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)59 services
  3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)53 services
  4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)30 services
  5. Hospital discharge day management, more than 30 minutes (99239)28 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis66%
  • Anxiety47%
  • Depression45%
  • Ischemic heart disease42%

Hospitals where Loren N. Bach works

Medicare's Facility Affiliation Data lists Loren N. Bach at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • Mercy Hospital St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260020
  • Mercy Hospital WashingtonWashington, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260052
  • St Lukes HospitalChesterfield, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260179

Practice locations

Addresses where Loren N. Bach is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Loren N. Bach as a member of these groups (CMS data updated October 2, 2026).

  • Elite Physical Therapy of Creve Coeur LLC91 clinicians in the group
  • Mercy Clinic Trauma and General Surgery LLC43 clinicians in the group

Specialties

Find other General Surgery doctors in Missouri →

Other general surgeons in Creve Coeur

Clinicians with the same Medicare primary specialty in Creve Coeur, MO — not a recommendation.

All general surgeons in Creve Coeur →

Other clinicians in Elite Physical Therapy of Creve Coeur LLC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Minnesota Medical School
Graduation year2013 (13 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1205279650
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians