Dr. William Spencer Lewis, MD
- Medicare services, 2024
- 1,751
- Medicare patients, 2024
- 731
- Part D claims, 2024
- 564
- Hospital affiliations
- 3
- Industry payments
- $1,296
- Practice address
- 300 Pasteur Drive, Stanford, CA 94305
- Practice phone
- Call (650) 723-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lewis' 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. William Spencer Lewis is an otolaryngologist in Stanford, California
Dr. Lewis practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.
Dr. Lewis' NPI, 1871585059, was assigned on August 16, 2005. Dr. Lewis graduated from Keck School of Medicine of USC in 1986. Dr. Lewis' California license number on file is G62557.
- NPI
- 1871585059NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335263508
- NPI enumeration date
- August 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (650) 723-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Spencer Lewis practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California
Dr. Lewis' primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.
- Stanford Hospital at 300 Pasteur Drive300 Pasteur Drive, Stanford, CA 94305 · Santa Clara CountyPhone(650) 723-4000
Source: Dmand AI Affiliation Data
Dr. William Spencer Lewis is affiliated with 3 sites of care and 1 medical group
Dr. Lewis' primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dr. Lewis is also affiliated with El Camino Health - Mountain View Hospital. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Lewis to 1 more hospital, named with a free account. Dr. Lewis' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Spencer Lewis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lewis practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Hospital at 300 Pasteur Drive | 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 Stanford University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. William Spencer Lewis is one of 1,107 otolaryngologists in California
Otolaryngology is Dr. Lewis' primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dr. Lewis is board certified in otolaryngology by the American Board of Otolaryngology - Head and Neck Surgery. Dr. Lewis has a license on file in California.
Specialties and state licenses
- Otolaryngology, CaliforniaPrimary
Clinical focus
Dmand AI lists acute sinusitis, chronic ear infection, chronic nasal allergies, chronic sinusitis, ear eustachian tube disorders, ear infection, endoscopic sinus surgery and hearing loss and impairment among the conditions Dr. Lewis treats.
Otolaryngologists near Dr. Lewis
Counts of otolaryngologists 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. William Spencer Lewis billed Medicare for 1,751 services in 2024
CMS data shows 1,751 Medicare services from Dr. Lewis across 13 procedure codes in 2024, for 731 Medicare patients. Medicare paid $148,536 for them. Every service was in an office.
Dr. Lewis' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9232024: 9655%
- Surgery
- 2023: 6442024: 71010%
- Tests and treatments
- 2023: 732024: 764%
- Imaging
- 2023: 112024: 0100%
Dr. Lewis compared with the California median for otolaryngologists, 2024
- Dr. Lewis
- California median
- Medicare services
- 1,751vs 6662.6 times
- Medicare patients
- 731vs 2962.5 times
- Part D claims
- 446vs 1183.8 times
Medians across 1,045 otolaryngologists in California with Dmand AI profiles that report each measure.
Dr. Lewis' 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.
Need commercial claims for Dr. Lewis?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lewis and other otolaryngologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Spencer Lewis treated 731 Medicare patients in 2024, average age 77
CMS counts 731 Medicare patients who saw Dr. Lewis in 2024. The largest group is 75 to 84, with 297 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 12% are also on Medicaid. Their average risk score is 1.21, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lewis' median patient age at 59, with 57% women.
Dr. Lewis' Medicare patients by age, 2024
Dr. Lewis' Medicare patients by sex, 2024
- Women43459%
- Men29741%
Chronic conditions among Dr. Lewis' Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis47%
- Ischemic heart disease30%
- Diabetes26%
- Osteoporosis25%
- Cancer21%
- Anxiety19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lewis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Spencer Lewis wrote 564 Medicare Part D claims in 2024
In 2024, Dr. Lewis wrote 564 Medicare Part D claims for 262 patients. 95% of them were for generic drugs. CMS names the drug for 446 of them, across 14 drugs with 11 or more claims each, at $13,627 in total drug cost. In 2023, CMS named 410 claims across 12 drugs.
Dr. Lewis' Part D claims by kind of drug, 2024
- Generic537 claims95%
- Brand-name27 claims5%
Dr. Lewis' 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. Lewis' Part D claims, 2024
- Antibiotics11%61 of 564 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: 4102024: 4469%
Drugs named by CMS: 14 in 2024, 12 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. William Spencer Lewis offers telehealth to Medicare patients
Dr. Lewis accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lewis as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- 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.
Dr. William Spencer Lewis received $1,296 in industry payments from 2016 to 2021
CMS Open Payments shows 27 general payments to Dr. Lewis from 14 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 65% of the total. Entellus Medical, Inc. paid the most, $448.
General payments to Dr. Lewis by program year, 2016 to 2021
General payments to Dr. Lewis by kind, 2016 to 2021
- Food and beverage$84965%
- Travel and lodging$44835%
Companies that paid Dr. Lewis the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Spencer Lewis has 1 award and honors on record
Dmand AI lists 1 award for Dr. Lewis.
Awards and honors for Dr. Lewis
- Undated
- AAO-HNS Fellow
Source: Dmand AI Professional Profile Data
Dr. William Spencer Lewis graduated from Keck School of Medicine of USC
Dr. Lewis graduated from Keck School of Medicine of USC in 1986. Dr. Lewis is a member of NHS.
- Medical school
- Board certified in otolaryngology
Source: Dmand AI Professional Profile Data
Dr. William Spencer Lewis accepts plans from 7 insurance carriers
Dr. Lewis is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- CMS Medicare
- Excellus BlueCross BlueShield
Plan types Dr. Lewis accepts, by number of carriers
- PPO6
- Medicare4
- EPO2
- HMO2
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. William Spencer Lewis'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) |
| 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. William Spencer Lewis
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. William Spencer Lewis' NPI number?
Dr. William Spencer Lewis' NPI number is 1871585059. It was assigned on August 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William Spencer Lewis?
Dr. William Spencer Lewis is an otolaryngologist in Stanford, California. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. William Spencer Lewis practice?
Dr. Lewis practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Lewis' primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Lewis to 1 hospital.
What is Dr. William Spencer Lewis' office phone number?
The practice phone on file for Dr. Lewis is (650) 723-4000.
What is Dr. William Spencer Lewis' medical license number?
Dr. Lewis' California license number on file is G62557.
Which hospitals is Dr. William Spencer Lewis affiliated with?
Dr. Lewis practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dr. Lewis is also affiliated with El Camino Health - Mountain View Hospital. Dmand AI links Dr. Lewis to 1 more hospital.
What medical group is Dr. William Spencer Lewis part of?
Dr. Lewis is linked to Stanford Health Care.
Does Dr. William Spencer Lewis accept Medicare?
Yes. CMS data shows Dr. Lewis billed Medicare for 1,751 services in 2024, and Dr. Lewis accepts Medicare assignment.
Does Dr. William Spencer Lewis offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Lewis as offering telehealth services.
How many Medicare patients does Dr. William Spencer Lewis see?
CMS counts 731 Medicare patients who saw Dr. Lewis in 2024, with an average age of 77.
Show 7 more questionsShow fewer questions
Is Dr. William Spencer Lewis board certified?
Yes. Dr. Lewis is board certified in otolaryngology by the American Board of Otolaryngology - Head and Neck Surgery.
What services does Dr. William Spencer Lewis bill to Medicare?
In 2024, Dr. Lewis' most billed Medicare services were surgery: ear (69210), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. William Spencer Lewis go to medical school?
Dr. Lewis graduated from Keck School of Medicine of USC in 1986.
What drugs does Dr. William Spencer Lewis prescribe most?
In 2024 Medicare Part D data, Dr. Lewis' most prescribed drugs by claims were Fluticasone Propionate, Ipratropium Bromide and Azelastine HCl.
Has Dr. William Spencer Lewis received payments from drug or device companies?
CMS Open Payments shows $1,296 in general payments to Dr. Lewis from 14 companies from 2016 to 2021. The largest total came from Entellus Medical, Inc.
How long has Dr. William Spencer Lewis been practicing?
Dr. Lewis graduated from medical school in 1986, 40 years ago.
What insurance does Dr. William Spencer Lewis accept?
Dr. Lewis is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
Selling to otolaryngology practices?
See otolaryngologists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card