Dr. Russell M. Greif, DO
- Medicare services, 2024
- 2,601
- Medicare patients, 2024
- 270
- Part D claims, 2024
- 2,989
- Hospital affiliations
- 1
- Industry payments
- $3,237
- Practice address
- 1600 W Ave J, Lancaster, CA 93534
- Practice phone
- Call (661) 949-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Greif'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. Russell M. Greif is an internist in Lancaster, California
Dr. Greif practices at Antelope Valley Medical Center in Lancaster, California, part of Antelope Valley Healthcare District.
Dr. Greif's NPI, 1669519765, was assigned on January 30, 2007. Dr. Greif graduated from WesternU College of Osteopathic Medicine of the Pacific in 1986. Dr. Greif holds California license 20A5410.
- NPI
- 1669519765NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911022934
- NPI enumeration date
- January 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (661) 949-5500
- 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. Russell M. Greif practices at Antelope Valley Medical Center in Lancaster, California
Dr. Greif's primary practice is Antelope Valley Medical Center, at 1600 W Ave J, Lancaster, CA 93534 in Los Angeles County. The practice phone is (661) 949-5500.
- Antelope Valley Medical Center1600 W Ave J, Lancaster, CA 93534 · Los Angeles CountyPhone(661) 949-5500
Source: Dmand AI Affiliation Data
Dr. Russell M. Greif is affiliated with 3 sites of care
Dr. Greif's primary practice is Antelope Valley Medical Center in Lancaster, California, part of Antelope Valley Healthcare District. Dmand AI also links Dr. Greif to 2 home health agencies, each named with a free account. Dr. Greif's 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. Russell M. Greif's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greif practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Antelope Valley Medical Center | 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 Antelope Valley Healthcare District and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Russell M. Greif is one of 16,751 internists in California
Internal medicine is Dr. Greif's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Greif is board certified in internal medicine by the American Board of Internal Medicine. Dr. Greif is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acid reflux, acute mini-stroke (TIA), acute respiratory failure, acute sinusitis, acute skin infection, ADHD, adjustment disease and aneurysm among the conditions Dr. Greif treats.
Internists near Dr. Greif
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. Russell M. Greif billed Medicare for 2,601 services in 2024
CMS data shows 2,601 Medicare services from Dr. Greif across 17 procedure codes in 2024, for 270 Medicare patients. Medicare paid $203,286 for them.
Dr. Greif's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,5342024: 1,89824%
- Other services
- 2023: 4792024: 53111%
- Tests and treatments
- 2023: 1132024: 15537%
- Surgery
- 2023: 02024: 17
Where Dr. Greif's Medicare services took place, 2024
- In an office2,01978%
- In a facility58222%
Dr. Greif compared with the California median for internists, 2024
- Dr. Greif
- California median
- Medicare services
- 2,601vs 3617.2 times
- Medicare patients
- 270vs 15179% above
- Part D claims
- 2,432vs 4215.8 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Greif's 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. Greif?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Greif and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Russell M. Greif treated 270 Medicare patients in 2024, average age 74
CMS counts 270 Medicare patients who saw Dr. Greif in 2024. The largest group is 65 to 74, with 123 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 18% are also on Medicaid. Their average risk score is 1.24, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Greif's median patient age at 67, with 44% women.
Dr. Greif's Medicare patients by age, 2024
Dr. Greif's Medicare patients by sex, 2024
- Women13249%
- Men13851%
Chronic conditions among Dr. Greif's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis49%
- Diabetes41%
- Ischemic heart disease24%
- Anxiety23%
- Mood disorders21%
- Cancer19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Greif's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Russell M. Greif wrote 2,989 Medicare Part D claims in 2024
In 2024, Dr. Greif wrote 2,989 Medicare Part D claims for 192 patients. 80% of them were for generic drugs. CMS names the drug for 2,432 of them, across 66 drugs with 11 or more claims each, at $283,485 in total drug cost. In 2023, CMS named 2,316 claims across 61 drugs.
Dr. Greif's Part D claims by kind of drug, 2024
- Generic2,402 claims80%
- Brand-name564 claims19%
- Other23 claims1%
Dr. Greif'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. Greif's Part D claims, 2024
- Antibiotics2%63 of 2,989 claims
- Antipsychotics, patients 65 and over0%11 of 2,989 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: 2,3162024: 2,4325%
Drugs named by CMS: 66 in 2024, 61 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. Russell M. Greif offers telehealth to Medicare patients
Dr. Greif accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Greif as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 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. Russell M. Greif received $3,237 in industry payments from 2016 to 2025
CMS Open Payments shows 81 general payments to Dr. Greif from 17 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $611.
General payments to Dr. Greif by program year, 2016 to 2025
Companies that paid Dr. Greif the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Russell M. Greif has 1 award and honors on record
Dmand AI lists 1 award for Dr. Greif, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Greif
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Russell M. Greif graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Greif graduated from WesternU College of Osteopathic Medicine of the Pacific in 1986.
- Medical school
- Board certified in internal medicine
- Board certified in 1988 - 2026
- Board certified in 1986 - 1987
Source: Dmand AI Professional Profile Data
Dr. Russell M. Greif accepts plans from 13 insurance carriers
Dr. Greif is in network with 13 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Elevance
- Alliant Health Plans
- Blue Cross Blue Shield of Michigan
- HCSC
- Aspirus Health Plan
- Blue Cross and Blue Shield of Kansas City
- +5 more carriersWith a free account
Plan types Dr. Greif accepts, by number of carriers
- PPO8
- HMO6
- EPO4
- POS4
- Medicare3
Source: Dmand AI Insurance Network Data
Sources for Dr. Russell M. Greif'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. Russell M. Greif
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. Russell M. Greif's NPI number?
Dr. Russell M. Greif's NPI number is 1669519765. It was assigned on January 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Russell M. Greif?
Dr. Russell M. Greif is an internist in Lancaster, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Russell M. Greif practice?
Dr. Greif practices at 1600 W Ave J, Lancaster, CA 93534. Dr. Greif's primary practice is Antelope Valley Medical Center in Lancaster, California, part of Antelope Valley Healthcare District. Dmand AI also links Dr. Greif to 2 home health agencies.
What is Dr. Russell M. Greif's office phone number?
The practice phone on file for Dr. Greif is (661) 949-5500.
What is Dr. Russell M. Greif's medical license number?
Dr. Greif holds California license 20A5410.
Which hospitals is Dr. Russell M. Greif affiliated with?
Dr. Greif practices at Antelope Valley Medical Center in Lancaster, California.
Does Dr. Russell M. Greif accept Medicare?
Yes. CMS data shows Dr. Greif billed Medicare for 2,601 services in 2024, and Dr. Greif accepts Medicare assignment.
Does Dr. Russell M. Greif offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Greif as offering telehealth services.
How many Medicare patients does Dr. Russell M. Greif see?
CMS counts 270 Medicare patients who saw Dr. Greif in 2024, with an average age of 74.
Is Dr. Russell M. Greif board certified?
Yes. Dr. Greif is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Russell M. Greif bill to Medicare?
In 2024, Dr. Greif's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and office visit, established patient (99213).
Where did Dr. Russell M. Greif go to medical school?
Dr. Greif graduated from WesternU College of Osteopathic Medicine of the Pacific in 1986.
What drugs does Dr. Russell M. Greif prescribe most?
In 2024 Medicare Part D data, Dr. Greif's most prescribed drugs by claims were Rosuvastatin Calcium, Amlodipine Besylate and Atorvastatin Calcium.
Has Dr. Russell M. Greif received payments from drug or device companies?
CMS Open Payments shows $3,237 in general payments to Dr. Greif from 17 companies from 2016 to 2025. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Russell M. Greif been practicing?
Dr. Greif graduated from medical school in 1986, 40 years ago.
What insurance does Dr. Russell M. Greif accept?
Dr. Greif is in network with 13 carriers, including Aetna, United Healthcare and Elevance. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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