Dr. Shelley M. Marks, MD
- Medicare services, 2024
- 241
- Medicare patients, 2024
- 189
- Part D claims, 2024
- 55
- Hospital affiliations
- 1
- Industry payments
- $1,859
- Practice address
- 795 El Camino Real, Palo Alto, CA 94301
- Practice phone
- Call (650) 324-1832
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center Palo Alto
Surgery Center - Medicare-Certified · Palo Alto, California
Find Dr. Marks' 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. Shelley M. Marks is a general surgeon in Palo Alto, California
Dr. Marks practices at Surgery Center Palo Alto in Palo Alto, California.
Dr. Marks' NPI, 1043325285, was assigned on August 20, 2006. Dr. Marks graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1993. Dr. Marks holds California license G81731.
- NPI
- 1043325285NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1759456452
- NPI enumeration date
- August 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (650) 324-1832
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Shelley M. Marks practices at Surgery Center Palo Alto in Palo Alto, California
Dr. Marks' primary practice is Surgery Center Palo Alto, at 795 El Camino Real, Palo Alto, CA 94301. The practice phone is (650) 324-1832.
- Surgery Center Palo Alto795 El Camino Real, Palo Alto, CA 94301Phone(650) 324-1832
Source: Dmand AI Affiliation Data
Dr. Shelley M. Marks is affiliated with 3 sites of care and 1 medical group
Dr. Marks' primary practice is Surgery Center Palo Alto in Palo Alto, California. Dr. Marks is also affiliated with Dignity Health - Sequoia Hospital. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Marks to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Shelley M. Marks' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marks practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center Palo Alto | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Shelley M. Marks is one of 2,926 general surgeons in California
Surgery is Dr. Marks' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Marks is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Marks' licenses on file in 2 states: California and Florida.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Florida license
Clinical focus
Dmand AI lists abdominal hernia repair surgery, acute gallbladder or bile duct inflammation, appendectomy, cancerous skin growth removal, colon removal, gallbladder removal, groin hernia surgery and hemorrhoids among the conditions Dr. Marks treats.
General surgeons near Dr. Marks
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. Shelley M. Marks billed Medicare for 241 services in 2024
CMS data shows 241 Medicare services from Dr. Marks across 9 procedure codes in 2024, for 189 Medicare patients. Medicare paid $42,065 for them.
Dr. Marks' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1952024: 1971%
- Surgery
- 2023: 732024: 4440%
Where Dr. Marks' Medicare services took place, 2024
- In an office21991%
- In a facility229%
Dr. Marks compared with the California median for general surgeons, 2024
- Dr. Marks
- California median
- Medicare services
- 241vs 16645% above
- Medicare patients
- 189vs 12156% above
- Part D claims
- 41vs 3421% above
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Marks' most billed Medicare procedure codes, 2024
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Shelley M. Marks treated 189 Medicare patients in 2024, average age 76
CMS counts 189 Medicare patients who saw Dr. Marks in 2024. The largest group is 75 to 84, with 82 patients. 72% of them have high cholesterol, and 60% have high blood pressure. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marks' median patient age at 57, with 49% women.
Dr. Marks' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Marks' Medicare patients by sex, 2024
- Women9048%
- Men9952%
Chronic conditions among Dr. Marks' Medicare patients, 2024
- High cholesterol72%
- High blood pressure60%
- Ischemic heart disease29%
- Arthritis28%
- Osteoporosis23%
- Atrial fibrillation20%
- Cancer19%
- Chronic kidney disease17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marks' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Shelley M. Marks wrote 55 Medicare Part D claims in 2024
In 2024, Dr. Marks wrote 55 Medicare Part D claims for 47 patients. 100% of them were for generic drugs. CMS names the drug for 41 of them, across 1 drug with 11 or more claims each, at $192 in total drug cost. In 2023, CMS named 45 claims across 1 drug.
Dr. Marks' 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.
Drug classes CMS tracks in Dr. Marks' Part D claims, 2024
- Opioids78%43 of 55 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 452024: 419%
Drugs named by CMS: 1 in 2024, 1 in 2023.
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
Dr. Shelley M. Marks ranks in the 98th percentile for hernia repair - groin (open) in Medicare
Dr. Marks accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marks as offering telehealth. CMS counts 31 procedures of hernia repair - groin (open) by Dr. Marks, more than 98% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Marks ranks in Medicare procedure volume
- Hernia repair - groin (open)
- 98th percentile31 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Shelley M. Marks received $1,859 in industry payments from 2017 to 2025
CMS Open Payments shows 23 general payments to Dr. Marks from 7 drug and device companies from 2017 to 2025. Travel and lodging make up the largest share, 77% of the total. Intuitive Surgical, Inc. paid the most, $1,683.
General payments to Dr. Marks by program year, 2017 to 2025
General payments to Dr. Marks by kind, 2017 to 2025
- Travel and lodging$1,42577%
- Food and beverage$43423%
Companies that paid Dr. Marks the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Shelley M. Marks has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Marks, most recently CMS Stage 1 EHR in 2012.
Awards and honors for Dr. Marks
- 2012
- CMS Stage 1 EHR
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Shelley M. Marks graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Marks graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1993. Dr. Marks is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Shelley M. Marks accepts plans from 11 insurance carriers
Dr. Marks is in network with 11 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- +3 more carriersWith a free account
Plan types Dr. Marks accepts, by number of carriers
- PPO7
- HMO6
- EPO4
- Medicare3
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Shelley M. Marks'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Shelley M. Marks
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. Shelley M. Marks' NPI number?
Dr. Shelley M. Marks' NPI number is 1043325285. It was assigned on August 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Shelley M. Marks?
Dr. Shelley M. Marks is a general surgeon in Palo Alto, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Shelley M. Marks practice?
Dr. Marks practices at 795 El Camino Real, Palo Alto, CA 94301. Dr. Marks' primary practice is Surgery Center Palo Alto in Palo Alto, California. Dmand AI also links Dr. Marks to 1 group practice or clinic.
What is Dr. Shelley M. Marks' office phone number?
The practice phone on file for Dr. Marks is (650) 324-1832.
What is Dr. Shelley M. Marks' medical license number?
Dr. Marks holds California license G81731, one of the licenses on file in 2 states.
Which states has Dr. Shelley M. Marks been licensed in?
Dmand AI has state licenses on file for Dr. Marks in California (1995 to 2027) and Florida (2012 to 2022).
Which hospitals is Dr. Shelley M. Marks affiliated with?
Dr. Marks is affiliated with Dignity Health - Sequoia Hospital.
What medical group is Dr. Shelley M. Marks part of?
Dr. Marks is linked to Palo Alto Foundation Medical Group.
Does Dr. Shelley M. Marks accept Medicare?
Yes. CMS data shows Dr. Marks billed Medicare for 241 services in 2024, and Dr. Marks accepts Medicare assignment.
Does Dr. Shelley M. Marks offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marks as offering telehealth services.
Show 8 more questionsShow fewer questions
How many Medicare patients does Dr. Shelley M. Marks see?
CMS counts 189 Medicare patients who saw Dr. Marks in 2024, with an average age of 76.
Is Dr. Shelley M. Marks board certified?
Yes. Dr. Marks is board certified in surgery by the American Board of Surgery.
What services does Dr. Shelley M. Marks bill to Medicare?
In 2024, Dr. Marks' most billed Medicare services were office visit, new patient (99205), office visit, new patient (99204) and office visit, established patient (99214).
Where did Dr. Shelley M. Marks go to medical school?
Dr. Marks graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1993.
What drugs does Dr. Shelley M. Marks prescribe most?
In 2024 Medicare Part D data, Dr. Marks' most prescribed drugs by claims were Oxycodone-Acetaminophen.
Has Dr. Shelley M. Marks received payments from drug or device companies?
CMS Open Payments shows $1,859 in general payments to Dr. Marks from 7 companies from 2017 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Shelley M. Marks been practicing?
Dr. Marks graduated from medical school in 1993, 33 years ago.
What insurance does Dr. Shelley M. Marks accept?
Dr. Marks is in network with 11 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 7. Check the plan with the practice before a visit.
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