LungLung DiseasesPilot Projects
Dr. Harold Henry Bach IV, MD
NPI1184886061PAC ID7416197173
- Medicare services, 2024
- 401
- Medicare patients, 2024
- 241
- Part D claims, 2024
- 56
- Publications
- 9
- Hospital affiliations
- 3
- Practice address
- 3815 Highland Avenue, Downers Grove, IL 60515
- Practice phone
- Call (630) 275-5900
- 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
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Harold Henry Bach IV is a general surgeon in Downers Grove, Illinois
Dr. Bach practices at Advocate Good Samaritan Hospital in Downers Grove, Illinois, part of Advocate Health.
Dr. Bach's NPI, 1184886061, was assigned on July 1, 2008. Dr. Bach graduated from Loyola University of Chicago, Stritch School of Medicine in 2008. Dr. Bach holds Illinois license 036.126328.
NPI and contact details
- NPI
- 1184886061NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416197173
- NPI enumeration date
- July 1, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (630) 275-5900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Harold Henry Bach IV practices at Advocate Good Samaritan Hospital in Downers Grove, Illinois
Dr. Bach's primary practice is Advocate Good Samaritan Hospital, at 3815 Highland Avenue, Downers Grove, IL 60515 in Du Page County. The practice phone is (630) 275-5900.
- Advocate Good Samaritan Hospital3815 Highland Avenue, Downers Grove, IL 60515 · Du Page CountyPhone(630) 275-5900
Source: Dmand AI Affiliation Data
Dr. Harold Henry Bach IV is affiliated with 6 sites of care and 2 medical groups
Dr. Bach's primary practice is Advocate Good Samaritan Hospital in Downers Grove, Illinois, part of Advocate Health. Dr. Bach is also affiliated with Advocate Lutheran General Hospital. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group). Dmand AI also links Dr. Bach to 1 more hospital, 2 group practices and clinics, 1 home health agency and 1 medical group, each named with a free account.
Advocate Lutheran General HospitalDreyer Medical Clinic (Advocate Medical Group)1 hospitalName with a free account2 group practices and clinicsNames with a free account1 home health agencyName with a free account1 medical groupName with a free account
See all 8 affiliations for Dr. BachSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Harold Henry Bach IV'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 |
|---|---|
| Advocate Good Samaritan Hospital | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Bach practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Advocate Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Harold Henry Bach IV is one of 1,217 general surgeons in Illinois
Surgery is Dr. Bach's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Bach is licensed in Illinois.
Specialties and state licenses
- Surgery, IllinoisPrimary
General surgeons near Dr. Bach
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
1,217general surgeons in Illinois20general surgeons in Downers Grove10general surgeons at Advocate Good Samaritan Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Harold Henry Bach IV billed Medicare for 401 services in 2024
CMS data shows 401 Medicare services from Dr. Bach across 7 procedure codes in 2024, for 241 Medicare patients. Medicare paid $39,630 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024401
Medicare patients241
Paid by Medicare$39,630
Procedure codes7
Dr. Bach's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 172024: 3501959%
- Surgery
- 2023: 02024: 51
Dr. Bach compared with the Illinois median for general surgeons, 2024
- Dr. Bach
- Illinois median
- Medicare services
- 401vs 1942.1 times
- Medicare patients
- 241vs 14467% above
- Part D claims
- 17vs 2839% below
Medians across 1,031 general surgeons in Illinois 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.
Need commercial claims for Dr. Bach?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bach and other general surgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Harold Henry Bach IV treated 241 Medicare patients in 2024, average age 76
CMS counts 241 Medicare patients who saw Dr. Bach in 2024. The largest group is 75 to 84, with 89 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 2.21, 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 73, with 45% women.
Medicare patients, 2024241
Average age76
Average risk score2.21
Also on Medicaid15%
Dr. Bach's Medicare patients by age, 2024
Dr. Bach's Medicare patients by sex, 2024
- Women12251%
- Men11949%
Chronic conditions among Dr. Bach's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Ischemic heart disease49%
- Chronic kidney disease47%
- Diabetes45%
- Heart failure40%
- Anxiety37%
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 73
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Harold Henry Bach IV wrote 56 Medicare Part D claims in 2024
In 2024, Dr. Bach wrote 56 Medicare Part D claims for 40 patients. 88% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $61 in total drug cost. In 2022, CMS named 11 claims across 1 drug.
Part D claims, 202456
Drugs named by CMS1
Total drug cost$61
Part D patients40
Dr. Bach's Part D claims by kind of drug, 2024
- Generic49 claims88%
- Brand-name and other7 claims13%
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
- Opioids39%22 of 56 claims
- Antibiotics32%18 of 56 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 112024: 1755%
Drugs named by CMS: 1 in 2024, 1 in 2022.
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. Harold Henry Bach IV ranks in the 93rd percentile for removal of tissue in Medicare
Dr. Bach accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 266 procedures of removal of tissue by Dr. Bach, more than 93% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Bach ranks in Medicare procedure volume
- Removal of tissue
- 93rd percentile266 procedures
- Hernia repair (minimally invasive)
- 81st percentile15 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)
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 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)
For MedTech and pharma teams
Find general surgeons like Dr. Bach by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Harold Henry Bach IV has 9 publications on record
Dmand AI links 9 papers to Dr. Bach, published from 2012 to 2014. The most frequent topics are Proteasome Endopeptidase Complex, Receptors, CXCR4 and Ubiquitin. Dr. Bach has published most often in J Trauma Acute Care Surg. Dr. Bach's most frequent co-authors are Todd Abram Baker, MD, Joel Andrew Strom, MD and Joshua M. Eberhardt, MD.
Papers9
Years published2012 to 2014
Dr. Bach's papers by year, 2012 to 2014
Topics Dr. Bach writes about most
- Proteasome Endopeptidase Complex
- Receptors, CXCR4
- Ubiquitin
- Benzylamines
- Blotting, Western
- Cyclams
- Disease Models, Animal
- Enzyme-Linked Immunosorbent Assay
Dr. Bach's most frequent co-authors
- Todd Abram Baker, MD4 shared papers
- Joel Andrew Strom, MD2 shared papers
- Joshua M. Eberhardt, MD1 shared paper
Recent publications by Dr. Bach
J Intensive Care Med
AbscessAnal CanalCritical Care
Mol Med
BenzylaminesCyclamsHeterocyclic Compounds
J Burn Care Res
Body WeightBurnsCalpain
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. Harold Henry Bach IV received $3,611 in industry payments from 2016 to 2025
CMS Open Payments shows 13 general payments to Dr. Bach from 8 drug and device companies from 2016 to 2025. Education make up the largest share, 83% of the total. Intuitive Surgical, Inc. paid the most, $3,238.
General payments to Dr. Bach by program year, 2016 to 2025
General payments to Dr. Bach by kind, 2016 to 2025
$3.6Kin total
- Education$3,00083%
- Food and beverage$61117%
Companies that paid Dr. Bach the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Harold Henry Bach IV graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Bach graduated from Loyola University of Chicago, Stritch School of Medicine in 2008.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Harold Henry Bach IV'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. Harold Henry Bach IV
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. Harold Henry Bach IV's NPI number?
Dr. Harold Henry Bach IV's NPI number is 1184886061. It was assigned on July 1, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Harold Henry Bach IV?
Dr. Harold Henry Bach IV is a general surgeon in Downers Grove, Illinois. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Harold Henry Bach IV practice?
Dr. Bach practices at 3815 Highland Avenue, Downers Grove, IL 60515. Dr. Bach's primary practice is Advocate Good Samaritan Hospital in Downers Grove, Illinois, part of Advocate Health. Dmand AI also links Dr. Bach to 1 hospital, 2 group practices and clinics, 1 home health agency and 1 medical group.
What is Dr. Harold Henry Bach IV's office phone number?
The practice phone on file for Dr. Bach is (630) 275-5900.
What is Dr. Harold Henry Bach IV's medical license number?
Dr. Bach holds Illinois license 036.126328.
Which hospitals is Dr. Harold Henry Bach IV affiliated with?
Dr. Bach practices at Advocate Good Samaritan Hospital in Downers Grove, Illinois. Dr. Bach is also affiliated with Advocate Lutheran General Hospital. Dmand AI links Dr. Bach to 1 more hospital.
What medical group is Dr. Harold Henry Bach IV part of?
Dr. Bach is linked to Dreyer Medical Clinic (Advocate Medical Group). Dmand AI links Dr. Bach to 1 more medical group.
Does Dr. Harold Henry Bach IV accept Medicare?
Yes. CMS data shows Dr. Bach billed Medicare for 401 services in 2024, and Dr. Bach accepts Medicare assignment.
How many Medicare patients does Dr. Harold Henry Bach IV see?
CMS counts 241 Medicare patients who saw Dr. Bach in 2024, with an average age of 76.
What services does Dr. Harold Henry Bach IV bill to Medicare?
In 2024, Dr. Bach's most billed Medicare services were hospital inpatient care (99233), critical care (99291) and office visit, established patient (99213).
Show 6 more questionsShow fewer questions
Where did Dr. Harold Henry Bach IV go to medical school?
Dr. Bach graduated from Loyola University of Chicago, Stritch School of Medicine in 2008.
What drugs does Dr. Harold Henry Bach IV prescribe most?
In 2024 Medicare Part D data, Dr. Bach's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Harold Henry Bach IV received payments from drug or device companies?
CMS Open Payments shows $3,611 in general payments to Dr. Bach from 8 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Harold Henry Bach IV been practicing?
Dr. Bach graduated from medical school in 2008, 18 years ago.
Does Dr. Harold Henry Bach IV do research?
Dmand AI links 9 publications to Dr. Bach, published from 2012 to 2014.
Who does Dr. Harold Henry Bach IV publish with?
Dr. Bach's most frequent co-authors are Todd Abram Baker, MD (4 shared papers), Joel Andrew Strom, MD (2 shared papers) and Joshua M. Eberhardt, MD (1 shared paper).
Selling to surgery practices?
See general surgeons in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card