Dr. William Steven Longfellow, MD
- Medicare services, 2023
- 1,347
- Part D claims, 2024
- 1,139
- Industry payments
- $208
- Affiliated sites
- 1
- State license
- 1
- Practice address
- 71780 San Jacinto Dr Bldg. H-1 Bldg H-1, Rancho Mirage, CA 92270
- Practice phone
- Call (760) 340-6777
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
William Steven Longfellow Md
Physician office · Rancho Mirage, California
Find Dr. Longfellow's professional email, personal email and mobile number
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Dr. William Steven Longfellow is an internist in Rancho Mirage, California
Dr. Longfellow practices at William Steven Longfellow Md in Rancho Mirage, California.
Dr. Longfellow's NPI, 1922149285, was assigned on February 9, 2007. Dr. Longfellow holds California license A50581.
- NPI
- 1922149285NPI Registry (opens in a new tab)
- NPI enumeration date
- February 9, 2007
- NPI status
- Active
- Practice phone
- (760) 340-6777
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William Steven Longfellow practices at 2 locations in Rancho Mirage, California
Dr. Longfellow's primary practice is William Steven Longfellow Md, at 71780 San Jacinto Dr Bldg. H-1 Bldg H-1, Rancho Mirage, CA 92270. The practice phone is (760) 340-6777. The NPI Registry lists Dr. Longfellow's practice address as 39000 Bob Hope Dr, Rancho Mirage, CA 92270.
- William Steven Longfellow MdPrimary71780 San Jacinto Dr Bldg. H-1 Bldg H-1, Rancho Mirage, CA 92270Phone(760) 340-6777
- NPI Registry address39000 Bob Hope Dr, Rancho Mirage, CA 92270 · Riverside CountyPhone(760) 340-6777
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. William Steven Longfellow is affiliated with 1 site of care
Dr. Longfellow's primary practice is William Steven Longfellow Md in Rancho Mirage, California.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William Steven Longfellow's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Longfellow practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| William Steven Longfellow Md | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Steven Longfellow is one of 16,751 internists in California
Internal medicine is Dr. Longfellow's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Longfellow is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Longfellow
Counts of internists 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 Steven Longfellow billed Medicare for 1,347 services in 2023
CMS data shows 1,347 Medicare services from Dr. Longfellow across 8 procedure codes in 2023. Medicare paid $96,140 for them. Every service was in an office.
Dr. Longfellow's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 9842023: 1,0446%
- Tests and treatments
- 2022: 1482023: 18928%
- Drugs given in the office
- 2022: 562023: 9061%
- Surgery
- 2022: 352023: 2431%
Dr. Longfellow compared with the California median for internists, 2023
- Dr. Longfellow
- California median
- Medicare services
- 1,347vs 3613.7 times
- Part D claims
- 742vs 42176% above
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Longfellow's most billed Medicare procedure codes, 2023
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. Longfellow?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Longfellow and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Steven Longfellow's patients have a median age of 80
Across all payers, Dmand AI patient panel data puts Dr. Longfellow's median patient age at 80, with 49% women.
Dr. Longfellow's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 80
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. William Steven Longfellow wrote 1,139 Medicare Part D claims in 2024
In 2024, Dr. Longfellow wrote 1,139 Medicare Part D claims for 219 patients. 90% of them were for generic drugs. CMS names the drug for 742 of them, across 31 drugs with 11 or more claims each, at $46,164 in total drug cost. In 2023, CMS named 4,112 claims across 96 drugs.
Dr. Longfellow's Part D claims by kind of drug, 2024
- Generic1,027 claims90%
- Brand-name and other112 claims10%
Dr. Longfellow's 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. Longfellow's Part D claims, 2024
- Antibiotics1%13 of 1,139 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: 4,1122024: 74282%
Drugs named by CMS: 31 in 2024, 96 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
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Dr. William Steven Longfellow received $208 in industry payments from 2016 to 2018
CMS Open Payments shows 8 general payments to Dr. Longfellow from 5 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 95% of the total. Bristol-Myers Squibb Company paid the most, $94.
General payments to Dr. Longfellow by program year, 2016 to 2018
General payments to Dr. Longfellow by kind, 2016 to 2018
- Food and beverage$19795%
- Education$115%
Companies that paid Dr. Longfellow the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Steven Longfellow'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 Affiliation DataDmand 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 |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Steven Longfellow
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 Steven Longfellow's NPI number?
Dr. William Steven Longfellow's NPI number is 1922149285. It was assigned on February 9, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. William Steven Longfellow?
Dr. William Steven Longfellow is an internist in Rancho Mirage, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Steven Longfellow practice?
Dr. Longfellow practices at 71780 San Jacinto Dr Bldg. H-1 Bldg H-1, Rancho Mirage, CA 92270. Dr. Longfellow also practices at 39000 Bob Hope Dr, Rancho Mirage, CA 92270. Dr. Longfellow's primary practice is William Steven Longfellow Md in Rancho Mirage, California.
What is Dr. William Steven Longfellow's office phone number?
The practice phone on file for Dr. Longfellow is (760) 340-6777.
What is Dr. William Steven Longfellow's medical license number?
Dr. Longfellow holds California license A50581.
Does Dr. William Steven Longfellow accept Medicare?
Yes. CMS data shows Dr. Longfellow billed Medicare for 1,347 services in 2023.
What services does Dr. William Steven Longfellow bill to Medicare?
In 2023, Dr. Longfellow's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and infusion or chemotherapy administration (96372).
What drugs does Dr. William Steven Longfellow prescribe most?
In 2024 Medicare Part D data, Dr. Longfellow's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. William Steven Longfellow received payments from drug or device companies?
CMS Open Payments shows $208 in general payments to Dr. Longfellow from 5 companies from 2016 to 2018. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. William Steven Longfellow been practicing?
Dr. Longfellow graduated from medical school in 1987, 39 years ago.
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