Br J Hosp Med (Lond)
AppendicitisContrast MediaDiagnosis, Differential
Dr. Mark Gorton Wills, MD
NPI1063525715
- Medicare services, 2019
- 79
- Part D claims, 2024
- 13
- Publications
- 2
- Industry payments
- $208
- Medical groups
- 2
- Practice address
- 347 Andrieux Street, Sonoma, CA 95476-6811
- Practice phone
- Call (707) 935-5100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Medical group
Find Dr. Wills' professional email, personal email and mobile number
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Dr. Mark Gorton Wills is an emergency medicine physician in Sonoma, California
Dr. Wills practices with San Francisco Emergency Medical Associates, a medical group.
Dr. Wills' NPI, 1063525715, was assigned on August 16, 2006. Dr. Wills graduated from College of Medicine - Tucson in 1982. Dr. Wills holds California license G63295.
NPI and contact details
- NPI
- 1063525715NPI Registry (opens in a new tab)
- NPI enumeration date
- August 16, 2006
- NPI status
- Active
- Practice phone
- (707) 935-5100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Mark Gorton Wills' practice address is in Sonoma, California
Dr. Wills' practice address in the NPI Registry is 347 Andrieux Street, Sonoma, CA 95476-6811. The practice phone is (707) 935-5100.
- NPI Registry address347 Andrieux Street, Sonoma, CA 95476-6811Phone(707) 935-5100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Gorton Wills is affiliated with 2 medical groups
Dr. Wills is part of San Francisco Emergency Medical Associates, a medical group in Mill Valley, California. The medical group on file is Big River Emergency Physicians Inc.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Gorton Wills' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Wills practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Francisco Emergency Medical Associates | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Wills practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across San Francisco Emergency Medical Associates and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Gorton Wills is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Wills' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Wills' licenses on file in 2 states: California and Arizona.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Arizona license
Emergency medicine physicians near Dr. Wills
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
7,423emergency medicine physicians in California
5emergency medicine physicians in Sonoma
32emergency medicine physicians at San Francisco Emergency Medical AssociatesSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Gorton Wills billed Medicare for 79 services in 2019
CMS data shows 79 Medicare services from Dr. Wills across 4 procedure codes in 2019. Medicare paid $6,121 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201979
Paid by Medicare$6,121
Procedure codes4
Dr. Wills' Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 1402019: 6355%
- Tests and treatments
- 2018: 342019: 1653%
Dr. Wills compared with the California median for emergency medicine physicians, 2019
- Dr. Wills
- California median
- Medicare services
- 79vs 26570% below
- Part D claims
- 20vs 6268% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Wills' most billed Medicare procedure codes, 2019
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. Wills and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Gorton Wills wrote 13 Medicare Part D claims in 2024
In 2024, Dr. Wills wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $158 in total drug cost. In 2017, CMS named 45 claims across 3 drugs.
Part D claims, 202413
Drugs named by CMS1
Total drug cost$158
Dr. Wills' most prescribed drugs by claims, 2018
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 452018: 2056%
Drugs named by CMS: 1 in 2018, 3 in 2017.
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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Dr. Mark Gorton Wills has 2 publications on record
Dmand AI links 2 papers to Dr. Wills. The most frequent topics are Diagnostic Imaging. Dr. Wills has published most often in Br J Hosp Med (Lond).
Papers2
Topics Dr. Wills writes about most
- Diagnostic Imaging
Recent publications by Dr. Wills
Br J Hosp Med (Lond)
AtherosclerosisColitisDiagnostic Imaging
See who Dr. Wills researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Wills works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Gorton Wills received $208 in industry payments in 2018
CMS Open Payments shows 29 general payments to Dr. Wills from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $208.
Companies that paid Dr. Wills the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Gorton Wills graduated from College of Medicine - Tucson
Dr. Wills graduated from College of Medicine - Tucson in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Gorton Wills'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 | Dmand 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 |
| 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) |
| 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. Mark Gorton Wills
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. Mark Gorton Wills' NPI number?
Dr. Mark Gorton Wills' NPI number is 1063525715. It was assigned on August 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Gorton Wills?
Dr. Mark Gorton Wills is an emergency medicine physician in Sonoma, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Mark Gorton Wills practice?
Dr. Wills practices at 347 Andrieux Street, Sonoma, CA 95476-6811. Dr. Wills' primary practice is San Francisco Emergency Medical Associates, a medical group.
What is Dr. Mark Gorton Wills' office phone number?
The practice phone on file for Dr. Wills is (707) 935-5100.
What is Dr. Mark Gorton Wills' medical license number?
Dr. Wills holds California license G63295, one of the licenses on file in 2 states.
Which states has Dr. Mark Gorton Wills been licensed in?
Dmand AI has state licenses on file for Dr. Wills in California (1988 to 2026) and Arizona (since 1984).
What medical group is Dr. Mark Gorton Wills part of?
Dr. Wills is part of San Francisco Emergency Medical Associates in Mill Valley, California. Dr. Wills is also linked to Big River Emergency Physicians Inc. Dmand AI links Dr. Wills to 2 medical groups in all.
Does Dr. Mark Gorton Wills accept Medicare?
Yes. CMS data shows Dr. Wills billed Medicare for 79 services in 2019.
What services does Dr. Mark Gorton Wills bill to Medicare?
In 2019, Dr. Wills' most billed Medicare services were emergency department visit (99285), emergency department visit (99283) and emergency department visit (99284).
Where did Dr. Mark Gorton Wills go to medical school?
Dr. Wills graduated from College of Medicine - Tucson in 1982.
Show 4 more questionsShow fewer questions
What drugs does Dr. Mark Gorton Wills prescribe most?
In 2018 Medicare Part D data, Dr. Wills' most prescribed drugs by claims were Cephalexin.
Has Dr. Mark Gorton Wills received payments from drug or device companies?
CMS Open Payments shows $208 in general payments to Dr. Wills from 1 company from 2018 to 2018. The largest total came from Abbott Laboratories.
How long has Dr. Mark Gorton Wills been practicing?
Dr. Wills graduated from medical school in 1982, 44 years ago.
Does Dr. Mark Gorton Wills do research?
Dmand AI links 2 publications to Dr. Wills.
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