Christopher Michael Brennan, OD
- Medicare patients, 2024
- 381
- Part D claims, 2024
- 2,690
- Hospital affiliations
- 1
- Industry payments
- $121
- Medical group
- 1
- Practice address
- 5501 Old York Road, Philadelphia, PA 19141
- Practice phone
- Call (215) 456-6090
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Christopher Brennan'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.
Christopher Michael Brennan is an optometrist in Philadelphia, Pennsylvania
Christopher Brennan practices at Jefferson Einstein Philadelphia Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University.
Christopher Brennan's NPI, 1801806625, was assigned on August 8, 2006. Christopher Brennan graduated from Pennsylvania College of Optometry in 2006. Christopher Brennan holds Pennsylvania license OEG001784.
- NPI
- 1801806625NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7416955406
- NPI enumeration date
- August 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (215) 456-6090
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Christopher Michael Brennan practices at Jefferson Einstein Philadelphia Hospital in Philadelphia, Pennsylvania
Christopher Brennan's primary practice is Jefferson Einstein Philadelphia Hospital, at 5501 Old York Road, Philadelphia, PA 19141 in Philadelphia County. The practice phone is (215) 456-6090.
- Jefferson Einstein Philadelphia Hospital5501 Old York Road, Philadelphia, PA 19141 · Philadelphia CountyPhone(215) 456-6090
Source: Dmand AI Affiliation Data
Christopher Michael Brennan is affiliated with 3 sites of care and 1 medical group
Christopher Brennan's primary practice is Jefferson Einstein Philadelphia Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University. The medical group on file is Einstein Gastroenterology Associates. Dmand AI also links Christopher Brennan to 1 more dialysis center and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Christopher Michael Brennan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Christopher Brennan practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Jefferson Einstein Philadelphia Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Thomas Jefferson University and 6.2K+ hospitals, with verified contacts in the same login.
Christopher Michael Brennan is one of 1,750 optometrists in Pennsylvania
Optometrist is Christopher Brennan's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Dmand AI has Christopher Brennan's licenses on file in 2 states: Pennsylvania and Delaware.
Specialties and state licenses
- Optometrist, PennsylvaniaPrimary
- Delaware license
Optometrists near Christopher Brennan
Counts of optometrists 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
Christopher Michael Brennan treated 381 Medicare patients in 2024, average age 71
CMS counts 381 Medicare patients who saw Christopher Brennan in 2024. The largest group is 65 to 74, with 192 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 1.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Christopher Brennan's median patient age at 70, with 62% women.
Christopher Brennan's Medicare patients by age, 2024
Christopher Brennan's Medicare patients by sex, 2024
- Women26269%
- Men11931%
Chronic conditions among Christopher Brennan's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes57%
- Arthritis45%
- Chronic kidney disease34%
- Ischemic heart disease27%
- Mood disorders22%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Christopher Brennan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women62%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Christopher Michael Brennan wrote 2,690 Medicare Part D claims in 2024
In 2024, Christopher Brennan wrote 2,690 Medicare Part D claims for 595 patients. 48% of them were for generic drugs.
Christopher Brennan's Part D claims by kind of drug, 2024
- Generic1,301 claims48%
- Brand-name1,389 claims52%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Christopher Michael Brennan takes part in Medicare
Christopher Brennan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Christopher Michael Brennan received $121 in industry payments in 2025
CMS Open Payments shows 5 general payments to Christopher Brennan from 4 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $44.
Companies that paid Christopher Brennan the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Christopher Michael Brennan graduated from Pennsylvania College of Optometry
Christopher Brennan graduated from Pennsylvania College of Optometry in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Christopher Michael Brennan'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 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 (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) |
| 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 Christopher Michael Brennan
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Christopher Michael Brennan's NPI number?
Christopher Michael Brennan's NPI number is 1801806625. It was assigned on August 8, 2006, and it is active in the NPI Registry.
What does Christopher Michael Brennan specialize in?
Christopher Michael Brennan is an optometrist in Philadelphia, Pennsylvania. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Christopher Michael Brennan practice?
Christopher Brennan practices at 5501 Old York Road, Philadelphia, PA 19141. Christopher Brennan's primary practice is Jefferson Einstein Philadelphia Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University. Dmand AI also links Christopher Brennan to 1 dialysis center and 1 group practice or clinic.
What is Christopher Michael Brennan's office phone number?
The practice phone on file for Christopher Brennan is (215) 456-6090.
What is Christopher Michael Brennan's medical license number?
Christopher Brennan holds Pennsylvania license OEG001784, one of the licenses on file in 2 states.
Which states has Christopher Michael Brennan been licensed in?
Dmand AI has state licenses on file for Christopher Brennan in Pennsylvania and Delaware.
Which hospitals is Christopher Michael Brennan affiliated with?
Christopher Brennan practices at Jefferson Einstein Philadelphia Hospital in Philadelphia, Pennsylvania.
What medical group is Christopher Michael Brennan part of?
Christopher Brennan is linked to Einstein Gastroenterology Associates.
Does Christopher Michael Brennan accept Medicare?
Yes. CMS lists Christopher Brennan as accepting Medicare assignment.
How many Medicare patients does Christopher Michael Brennan see?
CMS counts 381 Medicare patients who saw Christopher Brennan in 2024, with an average age of 71.
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Where did Christopher Michael Brennan go to medical school?
Christopher Brennan graduated from Pennsylvania College of Optometry in 2006.
Has Christopher Michael Brennan received payments from drug or device companies?
CMS Open Payments shows $121 in general payments to Christopher Brennan from 4 companies from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Christopher Michael Brennan been practicing?
Christopher Brennan graduated from medical school in 2006, 20 years ago.
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