Dr. Loren Nathan Bach, MD
- Medicare services, 2024
- 256
- Medicare patients, 2024
- 182
- Part D claims, 2024
- 62
- Publications
- 1
- Hospital affiliations
- 3
- Practice address
- 615 New Ballas Road, Saint Louis, MO 63141
- Practice phone
- Call (314) 251-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Bach's professional email, personal email and mobile number
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Dr. Loren Nathan Bach is a general surgeon in Saint Louis, Missouri
Dr. Bach practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Dr. Bach's NPI, 1205279650, was assigned on April 15, 2013. Dr. Bach graduated from University of Minnesota Medical School in 2013. Dr. Bach holds Missouri license 2019029089.
- NPI
- 1205279650NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7618272865
- NPI enumeration date
- April 15, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Loren Nathan Bach practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Dr. Bach's primary practice is Mercy Hospital St. Louis, at 615 New Ballas Road, Saint Louis, MO 63141 in St. Louis County. The practice phone is (314) 251-6000.
- Mercy Hospital St. Louis615 New Ballas Road, Saint Louis, MO 63141 · St. Louis CountyPhone(314) 251-6000
Source: Dmand AI Affiliation Data
Dr. Loren Nathan Bach is affiliated with 6 sites of care and 3 medical groups
Dr. Bach's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dr. Bach is also affiliated with St. Luke's Hospital. The medical group on file is Mercy Clinic Trauma and General Surgery. Dmand AI also links Dr. Bach to 1 more hospital, 3 group practices and clinics and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Loren Nathan Bach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bach practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | Available with a free account |
| +5 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Loren Nathan Bach is one of 593 general surgeons in Missouri
Surgery is Dr. Bach's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Bach's licenses on file in 2 states: Missouri and Minnesota.
Specialties and state licenses
- Surgery, MissouriPrimary
- Neurological surgery, Minnesota
General surgeons near Dr. Bach
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Loren Nathan Bach billed Medicare for 256 services in 2024
CMS data shows 256 Medicare services from Dr. Bach across 5 procedure codes in 2024, for 182 Medicare patients. Medicare paid $22,749 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Bach's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2092024: 25622%
- Surgery
- 2023: 142024: 0100%
Dr. Bach compared with the Missouri median for general surgeons, 2024
- Dr. Bach
- Missouri median
- Medicare services
- 256vs 16951% above
- Medicare patients
- 182vs 12743% above
- Part D claims
- 37vs 4110% below
Medians across 570 general surgeons in Missouri with Dmand AI profiles that report each measure.
Dr. Bach's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bach and other general surgeons in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Loren Nathan Bach treated 182 Medicare patients in 2024, average age 75
CMS counts 182 Medicare patients who saw Dr. Bach in 2024. The largest group is 65 to 74, with 61 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.77, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Bach's median patient age at 66, with 50% women.
Dr. Bach's Medicare patients by age, 2024
Dr. Bach's Medicare patients by sex, 2024
- Women9753%
- Men8547%
Chronic conditions among Dr. Bach's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Mood disorders51%
- Anxiety47%
- Depression45%
- Ischemic heart disease42%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women50%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Loren Nathan Bach wrote 62 Medicare Part D claims in 2024
In 2024, Dr. Bach wrote 62 Medicare Part D claims for 49 patients. 97% of them were for generic drugs. CMS names the drug for 37 of them, across 2 drugs with 11 or more claims each, at $115 in total drug cost. In 2023, CMS named 38 claims across 2 drugs.
Dr. Bach's Part D claims by kind of drug, 2024
- Generic60 claims97%
- Brand-name and other2 claims3%
Dr. Bach's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Bach's Part D claims, 2024
- Opioids69%43 of 62 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 382024: 373%
Drugs named by CMS: 2 in 2024, 2 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Loren Nathan Bach ranks in the 62nd percentile for removal of tissue in Medicare
Dr. Bach accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 11 procedures of removal of tissue by Dr. Bach, more than 62% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Bach ranks in Medicare procedure volume
- Removal of tissue
- 62nd percentile11 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Loren Nathan Bach has 1 publication on record
Dmand AI links 1 paper to Dr. Bach in 2017. Dr. Bach's most frequent co-author is David J. Dries, MD.
Dr. Bach's most frequent co-authors
Recent publications by Dr. Bach
See who Dr. Bach researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Bach works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Loren Nathan Bach received $2,521 in industry payments from 2020 to 2025
CMS Open Payments shows 30 general payments to Dr. Bach from 13 drug and device companies from 2020 to 2025. Travel and lodging make up the largest share, 65% of the total. Zimmer Biomet Holdings, Inc. paid the most, $1,808.
General payments to Dr. Bach by program year, 2020 to 2025
General payments to Dr. Bach by kind, 2020 to 2025
- Travel and lodging$1,64465%
- Food and beverage$87735%
Companies that paid Dr. Bach the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Loren Nathan Bach graduated from University of Minnesota Medical School
Dr. Bach graduated from University of Minnesota Medical School in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Loren Nathan Bach's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Loren Nathan Bach
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Loren Nathan Bach's NPI number?
Dr. Loren Nathan Bach's NPI number is 1205279650. It was assigned on April 15, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Loren Nathan Bach?
Dr. Loren Nathan Bach is a general surgeon in Saint Louis, Missouri. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Loren Nathan Bach practice?
Dr. Bach practices at 615 New Ballas Road, Saint Louis, MO 63141. Dr. Bach's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dmand AI also links Dr. Bach to 1 hospital, 3 group practices and clinics and 2 medical groups.
What is Dr. Loren Nathan Bach's office phone number?
The practice phone on file for Dr. Bach is (314) 251-6000.
What is Dr. Loren Nathan Bach's medical license number?
Dr. Bach holds Missouri license 2019029089, one of the licenses on file in 2 states.
Which states has Dr. Loren Nathan Bach been licensed in?
Dmand AI has state licenses on file for Dr. Bach in Missouri and Minnesota.
Which hospitals is Dr. Loren Nathan Bach affiliated with?
Dr. Bach practices at Mercy Hospital St. Louis in Saint Louis, Missouri. Dr. Bach is also affiliated with St. Luke's Hospital. Dmand AI links Dr. Bach to 1 more hospital.
What medical group is Dr. Loren Nathan Bach part of?
Dr. Bach is linked to Mercy Clinic Trauma and General Surgery. Dmand AI links Dr. Bach to 2 more medical groups.
Does Dr. Loren Nathan Bach accept Medicare?
Yes. CMS data shows Dr. Bach billed Medicare for 256 services in 2024, and Dr. Bach accepts Medicare assignment.
How many Medicare patients does Dr. Loren Nathan Bach see?
CMS counts 182 Medicare patients who saw Dr. Bach in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Loren Nathan Bach bill to Medicare?
In 2024, Dr. Bach's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and hospital inpatient care (99233).
Where did Dr. Loren Nathan Bach go to medical school?
Dr. Bach graduated from University of Minnesota Medical School in 2013.
What drugs does Dr. Loren Nathan Bach prescribe most?
In 2024 Medicare Part D data, Dr. Bach's most prescribed drugs by claims were Oxycodone HCl and Hydrocodone-Acetaminophen.
Has Dr. Loren Nathan Bach received payments from drug or device companies?
CMS Open Payments shows $2,521 in general payments to Dr. Bach from 13 companies from 2020 to 2025. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Loren Nathan Bach been practicing?
Dr. Bach graduated from medical school in 2013, 13 years ago.
Does Dr. Loren Nathan Bach do research?
Dmand AI links 1 publication to Dr. Bach.
Who does Dr. Loren Nathan Bach publish with?
Dr. Bach's most frequent co-authors are David J. Dries, MD (1 shared paper).
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