Dr. Marcus Leon Gann Jr., MD
- Medicare services, 2016
- 96
- Industry payments
- $53
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 900 E Hamilton Ave, Campbell, CA 95008
- Practice phone
- Call (469) 466-7007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Signify Health
Campbell, California
Find Dr. Gann'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. Marcus Leon Gann Jr. is a general surgeon in Campbell, California
Dr. Gann practices at Signify Health in Campbell, California.
Dr. Gann's NPI, 1124207527, was assigned on November 1, 2007. Dr. Gann graduated from American University of the Caribbean School of Medicine in 2000. Dr. Gann's Kansas license number on file is 04-32823.
- NPI
- 1124207527NPI Registry (opens in a new tab)
- NPI enumeration date
- November 1, 2007
- NPI status
- Active
- Practice phone
- (469) 466-7007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Marcus Leon Gann Jr. practices at Signify Health in Campbell, California
Dr. Gann's primary practice is Signify Health, at 900 E Hamilton Ave, Campbell, CA 95008 in Santa Clara County. The practice phone is (469) 466-7007.
- Signify Health900 E Hamilton Ave, Campbell, CA 95008 · Santa Clara CountyPhone(469) 466-7007
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Marcus Leon Gann Jr. is affiliated with 2 sites of care and 1 medical group
Dr. Gann's primary practice is Signify Health in Campbell, California. The medical group on file is Signify Health. Dmand AI also links Dr. Gann to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Marcus Leon Gann Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gann practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Signify Health | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marcus Leon Gann Jr. is one of 2,926 general surgeons in California
Surgery is Dr. Gann's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Gann's licenses on file in 2 states: Kansas and Indiana.
Specialties and state licenses
- Surgery, KansasPrimary
- Indiana license
General surgeons near Dr. Gann
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. Marcus Leon Gann Jr. billed Medicare for 96 services in 2016
CMS data shows 96 Medicare services from Dr. Gann across 4 procedure codes in 2016. Medicare paid $6,011 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gann's Medicare services by type, 2016
- Surgery49
- Tests and treatments47
Dr. Gann compared with the California median for general surgeons, 2016
- Dr. Gann
- California median
- Medicare services
- 96vs 16642% below
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Gann's most billed Medicare procedure codes, 2016
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. Gann and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marcus Leon Gann Jr.'s patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Gann's median patient age at 73, with 51% women.
Dr. Gann'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
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
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Dr. Marcus Leon Gann Jr. received $53 in industry payments in 2016
CMS Open Payments shows 3 general payments to Dr. Gann from 3 drug and device companies in 2016. Food and beverage make up the largest share, 100% of the total. Organogenesis Inc. paid the most, $22.
Companies that paid Dr. Gann the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marcus Leon Gann Jr. graduated from American University of the Caribbean School of Medicine
Dr. Gann graduated from American University of the Caribbean School of Medicine in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Marcus Leon Gann Jr. accepts plans from 1 insurance carrier
Dr. Gann is in network with 1 carrier, including Highmark. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Highmark
Plan types Dr. Gann accepts, by number of carriers
- HMO1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Marcus Leon Gann Jr.'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 Data |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Marcus Leon Gann Jr.
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. Marcus Leon Gann Jr.'s NPI number?
Dr. Marcus Leon Gann Jr.'s NPI number is 1124207527. It was assigned on November 1, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Marcus Leon Gann Jr.?
Dr. Marcus Leon Gann Jr. is a general surgeon in Campbell, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Marcus Leon Gann Jr. practice?
Dr. Gann practices at 900 E Hamilton Ave, Campbell, CA 95008. Dr. Gann's primary practice is Signify Health in Campbell, California. Dmand AI also links Dr. Gann to 1 group practice or clinic.
What is Dr. Marcus Leon Gann Jr.'s office phone number?
The practice phone on file for Dr. Gann is (469) 466-7007.
What is Dr. Marcus Leon Gann Jr.'s medical license number?
Dr. Gann's Kansas license number on file is 04-32823, one of the licenses on file in 2 states.
Which states has Dr. Marcus Leon Gann Jr. been licensed in?
Dmand AI has state licenses on file for Dr. Gann in Kansas (2007 to 2019) and Indiana (2018 to 2025).
What medical group is Dr. Marcus Leon Gann Jr. part of?
Dr. Gann is linked to Signify Health.
Does Dr. Marcus Leon Gann Jr. accept Medicare?
Yes. CMS data shows Dr. Gann billed Medicare for 96 services in 2016.
What services does Dr. Marcus Leon Gann Jr. bill to Medicare?
In 2016, Dr. Gann's most billed Medicare services were heart test or procedure (93010), surgery: digestive system (45378) and surgery: digestive system (43239).
Where did Dr. Marcus Leon Gann Jr. go to medical school?
Dr. Gann graduated from American University of the Caribbean School of Medicine in 2000.
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Has Dr. Marcus Leon Gann Jr. received payments from drug or device companies?
CMS Open Payments shows $53 in general payments to Dr. Gann from 3 companies from 2016 to 2016. The largest total came from Organogenesis Inc.
How long has Dr. Marcus Leon Gann Jr. been practicing?
Dr. Gann graduated from medical school in 2000, 26 years ago.
What insurance does Dr. Marcus Leon Gann Jr. accept?
Dr. Gann is in network with 1 carrier, including Highmark. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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