Dr. Daniel L. Zimmerman, MD
- Medicare services, 2022
- 24
- Part D claims, 2022
- 15
- Industry payments
- $83
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 280 Sierra College Dr, Grass Valley, CA 95945
- Practice phone
- Call (530) 274-6727
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea
Grass Valley, California
Find Dr. Zimmerman'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. Daniel L. Zimmerman is an OB-GYN in Grass Valley, California
Dr. Zimmerman practices at Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea in Grass Valley, California.
Dr. Zimmerman's NPI, 1124121223, was assigned on September 6, 2006. Dr. Zimmerman graduated from Loma Linda University School Of Medicine in 1979. Dr. Zimmerman holds California license G44114.
- NPI
- 1124121223NPI Registry (opens in a new tab)
- NPI enumeration date
- September 6, 2006
- NPI status
- Active
- Practice phone
- (530) 274-6727
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Daniel L. Zimmerman practices at Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea in Grass Valley, California
Dr. Zimmerman's primary practice is Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea, at 280 Sierra College Dr, Grass Valley, CA 95945 in Nevada County. The practice phone is (530) 274-6727.
- Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea280 Sierra College Dr, Grass Valley, CA 95945 · Nevada CountyPhone(530) 274-6727
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Daniel L. Zimmerman is affiliated with 2 sites of care and 1 medical group
Dr. Zimmerman's primary practice is Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea in Grass Valley, California. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Dr. Zimmerman to 1 more physician office, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Daniel L. Zimmerman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zimmerman practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel L. Zimmerman is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Zimmerman's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Zimmerman is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dr. Zimmerman is licensed in California.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
Clinical focus
Dmand AI lists menopause, pelvic prolapse and vaginal infection among the conditions Dr. Zimmerman treats.
OB-GYNs near Dr. Zimmerman
Counts of OB-GYNs 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. Daniel L. Zimmerman billed Medicare for 24 services in 2022
CMS data shows 24 Medicare services from Dr. Zimmerman across 1 procedure code in 2022, all of them office visits. Medicare paid $1,523 for them. Every service was in an office.
Dr. Zimmerman's Medicare services by type, 2020 to 2022
- 2020
- 2022
- Office and hospital visits
- 2020: 212022: 2414%
Dr. Zimmerman compared with the California median for OB-GYNs, 2022
- Dr. Zimmerman
- California median
- Medicare services
- 24vs 5859% below
- Part D claims
- 15vs 3557% below
Medians across 3,823 OB-GYNs in California with Dmand AI profiles that report each measure.
Dr. Zimmerman's most billed Medicare procedure codes, 2022
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. Zimmerman and other OB-GYNs in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel L. Zimmerman's patients have a median age of 31
Across all payers, Dmand AI patient panel data puts Dr. Zimmerman's median patient age at 31, with 99% women.
Dr. Zimmerman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 31
Patient panel by sex, all payers
- Women99%
- Men1%
Source: Dmand AI Patient Panel Data
Dr. Daniel L. Zimmerman wrote 15 Medicare Part D claims in 2022
In 2022, Dr. Zimmerman wrote 15 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $876 in total drug cost. In 2020, CMS named 14 claims across 1 drug.
Dr. Zimmerman's most prescribed drugs by claims, 2022
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, 2020 to 2022
- 2020
- 2022
- Claims for drugs CMS names
- 2020: 142022: 157%
Drugs named by CMS: 1 in 2022, 1 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Daniel L. Zimmerman received $83 in industry payments from 2017 to 2019
CMS Open Payments shows 3 general payments to Dr. Zimmerman from 3 drug and device companies from 2017 to 2019. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $52.
General payments to Dr. Zimmerman by program year, 2017 to 2019
Companies that paid Dr. Zimmerman the most, 2017 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Daniel L. Zimmerman has 1 award and honors on record
Dmand AI lists 1 award for Dr. Zimmerman.
Awards and honors for Dr. Zimmerman
- Undated
- ACOG Fellow
Source: Dmand AI Professional Profile Data
Dr. Daniel L. Zimmerman graduated from Loma Linda University School Of Medicine
Dr. Zimmerman graduated from Loma Linda University School Of Medicine in 1979. Dr. Zimmerman is a member of American College of Obstetricians and Gynecologists.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Dr. Daniel L. Zimmerman accepts plans from 13 insurance carriers
Dr. Zimmerman is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Zimmerman accepts, by number of carriers
- PPO10
- HMO6
- Medicare6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Daniel L. Zimmerman'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| 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. Daniel L. Zimmerman
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. Daniel L. Zimmerman's NPI number?
Dr. Daniel L. Zimmerman's NPI number is 1124121223. It was assigned on September 6, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel L. Zimmerman?
Dr. Daniel L. Zimmerman is an OB-GYN in Grass Valley, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Daniel L. Zimmerman practice?
Dr. Zimmerman practices at 280 Sierra College Dr, Grass Valley, CA 95945. Dr. Zimmerman's primary practice is Dignity Health Medical Group - Sierra Nevada, a Service of Dignity Hea in Grass Valley, California. Dmand AI also links Dr. Zimmerman to 1 physician office.
What is Dr. Daniel L. Zimmerman's office phone number?
The practice phone on file for Dr. Zimmerman is (530) 274-6727.
What is Dr. Daniel L. Zimmerman's medical license number?
Dr. Zimmerman holds California license G44114.
What medical group is Dr. Daniel L. Zimmerman part of?
Dr. Zimmerman is linked to Palo Alto Foundation Medical Group.
Does Dr. Daniel L. Zimmerman accept Medicare?
Yes. CMS data shows Dr. Zimmerman billed Medicare for 24 services in 2022.
Is Dr. Daniel L. Zimmerman board certified?
Yes. Dr. Zimmerman is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
What services does Dr. Daniel L. Zimmerman bill to Medicare?
In 2022, Dr. Zimmerman's most billed Medicare services were office visit, established patient (99213).
Where did Dr. Daniel L. Zimmerman go to medical school?
Dr. Zimmerman graduated from Loma Linda University School Of Medicine in 1979.
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What drugs does Dr. Daniel L. Zimmerman prescribe most?
In 2022 Medicare Part D data, Dr. Zimmerman's most prescribed drugs by claims were Estradiol.
Has Dr. Daniel L. Zimmerman received payments from drug or device companies?
CMS Open Payments shows $83 in general payments to Dr. Zimmerman from 3 companies from 2017 to 2019. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Daniel L. Zimmerman been practicing?
Dr. Zimmerman graduated from medical school in 1979, 47 years ago.
What insurance does Dr. Daniel L. Zimmerman accept?
Dr. Zimmerman is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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