Dr. Robert Allan Alter, MD
- Part D claims, 2024
- 53
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 2545 S King Dr, Chicago, IL 60616-2441
- Practice phone
- Call (312) 842-7117
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Advocate Medical Group (dreyer) - Chicago (2545 S King Dr)
Primary care practice · Chicago, Illinois
Find Dr. Alter'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. Robert Allan Alter is a geriatric medicine (internal medicine) physician in Chicago, Illinois
Dr. Alter practices at Advocate Medical Group (dreyer) - Chicago (2545 S King Dr) in Chicago, Illinois.
Dr. Alter's NPI, 1821064585, was assigned on February 23, 2006.
- NPI
- 1821064585NPI Registry (opens in a new tab)
- NPI enumeration date
- February 23, 2006
- NPI status
- Active
- Practice phone
- (312) 842-7117
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Allan Alter practices at Advocate Medical Group (dreyer) - Chicago (2545 S King Dr) in Chicago, Illinois
Dr. Alter's primary practice is Advocate Medical Group (dreyer) - Chicago (2545 S King Dr), at 2545 S King Dr, Chicago, IL 60616-2441. The practice phone is (312) 842-7117.
- Advocate Medical Group (dreyer) - Chicago (2545 S King Dr)2545 S King Dr, Chicago, IL 60616-2441Phone(312) 842-7117
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert Allan Alter is affiliated with 1 site of care and 1 medical group
Dr. Alter's primary practice is Advocate Medical Group (dreyer) - Chicago (2545 S King Dr) in Chicago, Illinois. The medical group on file is Dreyer Medical Clinic (Advocate Medical Group).
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Robert Allan Alter's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Alter practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Advocate Medical Group (dreyer) - Chicago (2545 S King Dr) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert Allan Alter is one of 135 geriatric medicine (internal medicine) physicians in Illinois
Geriatric medicine is Dr. Alter's primary specialty in the NPI Registry, under taxonomy code 207RG0300X. Dr. Alter has a license on file in Illinois.
Specialties and state licenses
- Geriatric medicine (internal medicine), Illinois
Geriatric medicine (internal medicine) physicians near Dr. Alter
Counts of geriatric medicine (internal medicine) physicians 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. Robert Allan Alter's patients have a median age of 75
Across all payers, Dmand AI patient panel data puts Dr. Alter's median patient age at 75, with 68% women.
Dr. Alter's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women68%
- Men27%
Source: Dmand AI Patient Panel Data
Dr. Robert Allan Alter wrote 53 Medicare Part D claims in 2024
In 2024, Dr. Alter wrote 53 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 51 of them, across 1 drug with 11 or more claims each, at $221 in total drug cost.
Dr. Alter'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.
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
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Sources for Dr. Robert Allan Alter'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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. Robert Allan Alter
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. Robert Allan Alter's NPI number?
Dr. Robert Allan Alter's NPI number is 1821064585. It was assigned on February 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert Allan Alter?
Dr. Robert Allan Alter is a geriatric medicine (internal medicine) physician in Chicago, Illinois. The primary specialty in the NPI Registry is Geriatric Medicine (Internal Medicine) Physician (taxonomy code 207RG0300X).
Where does Dr. Robert Allan Alter practice?
Dr. Alter practices at 2545 S King Dr, Chicago, IL 60616-2441. Dr. Alter's primary practice is Advocate Medical Group (dreyer) - Chicago (2545 S King Dr) in Chicago, Illinois.
What is Dr. Robert Allan Alter's office phone number?
The practice phone on file for Dr. Alter is (312) 842-7117.
What medical group is Dr. Robert Allan Alter part of?
Dr. Alter is linked to Dreyer Medical Clinic (Advocate Medical Group).
What drugs does Dr. Robert Allan Alter prescribe most?
In 2024 Medicare Part D data, Dr. Alter's most prescribed drugs by claims were Omeprazole.
How long has Dr. Robert Allan Alter been practicing?
Dr. Alter's NPI was assigned in 2006.
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