Zachary Berg, M.D.
Pulmonary Disease Physician · O Fallon, IL
Zachary Berg, M.D. is a pulmonary disease physician with a practice address in O Fallon, Illinois, and NPI 1255741278, issued on Apr 29, 2014. Check the license (Illinois 036150902, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Zachary Berg
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- 036150902 IL
Self-reported in NPPES; status is on the state search - Practice location
- 3 Saint Elizabeth Blvd Ste 5000, O Fallon, IL 62269
- Phone
- (618) 641-5803
- Enumerated
- Apr 29, 2014
- Record last updated
- Jul 1, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200512003680); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 617 in Illinois → Look up another NPI →
Also registered at 3 Saint Elizabeth Blvd Ste 5000
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Angela Croessman-Marshall, AGNP-CAdult Health Nurse Practitioner1023994274
- Randall Dooley, MDUrology Physician1619940640
- Allison Harris, PA-CPhysician Assistant1790588739
- Kostantinos Psihramis, M.D.Urology Physician1902889793
Verify Zachary Berg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036150902Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% more Medicare Part D claims than the average pulmonary disease physician in 2024
2,618 Medicare Part D claims for 436 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 68% of claims.
Most prescribed
- Trelegy Ellipta646 claims
- Albuterol Sulfate Hfa400 claims
- Montelukast Sodium179 claims
- Breo Ellipta172 claims
- Breztri Aerosphere161 claims
- Fluticasone Propionate102 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 94.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $10,312.45
48 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, Inc. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Hshs Medical Group IncO Fallon, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary Berg among 617 pulmonary disease physician records in Illinois
Zachary Berg, M.D. is one of 617 pulmonary disease physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 74% of them.
- NPI issued2014 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2014 · median 2005 among the 444 with a school on file
- Record last updated2020 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in Illinois
There are 617 pulmonary disease physician records in Illinois.
All 617 in Illinois → Every provider in O Fallon → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Muhammad Asghar, M.D.Shiloh, IL 622691447416342
- Christopher Sutton, D.O.O Fallon, IL 622691558771220
- Elie Chbeir, MDQuincy, IL 623011063553303
- Miguel Pardinas Gutierrez, MDQuincy, IL 623011568876407
- Venu Reddy, M.D.Quincy, IL 623011164429957
- Nanjappa Somanna, M.D.Quincy, IL 623011306850615
- Kashif Bhutto, MDBelleville, IL 622261083791651
- Salik Choudhary, MDBelleville, IL 622261386986578
Common questions
What is Zachary Berg, M.D.'s NPI number?
Zachary Berg, M.D.'s National Provider Identifier (NPI) is 1255741278, issued on Apr 29, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Berg, M.D. located?
The NPPES record lists a practice address at 3 Saint Elizabeth Blvd Ste 5000, O Fallon, IL, 62269. Phone: (618) 641-5803. Providers update this record themselves, so call before visiting.
How can I verify Zachary Berg, M.D.'s license?
NPPES lists Illinois license number 036150902, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Berg, M.D. prescribe under Medicare Part D?
In 2024, Zachary Berg, M.D. had 2,618 Medicare Part D claims for 436 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is Zachary Berg, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.6 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.