Dr. Michael G. Klassen, MD
- Medicare services, 2024
- 14
- Medicare patients, 2024
- 21
- Part D claims, 2024
- 18
- Industry payments
- $646
- Affiliated sites
- 2
- Practice address
- 2 Upper Ragsdale Drive, Bldg B, Suite B160, Monterey, CA 93940
- Practice phone
- Call (831) 333-4060
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Monterey Peninsula Surgery Center - Ryan Ranch
Surgery Center - Medicare-Certified · Monterey, California
Find Dr. Klassen'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. Michael G. Klassen is an orthopedic surgeon in Monterey, California
Dr. Klassen practices at Monterey Peninsula Surgery Center - Ryan Ranch in Monterey, California.
Dr. Klassen's NPI, 1932234952, was assigned on February 22, 2007. Dr. Klassen graduated from David Geffen School of Medicine at UCLA in 1989. Dr. Klassen holds California license G69478.
- NPI
- 1932234952NPI Registry (opens in a new tab)
- NPI enumeration date
- February 22, 2007
- NPI status
- Active
- Practice phone
- (831) 333-4060
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Michael G. Klassen practices at Monterey Peninsula Surgery Center - Ryan Ranch in Monterey, California
Dr. Klassen's primary practice is Monterey Peninsula Surgery Center - Ryan Ranch, at 2 Upper Ragsdale Drive, Bldg B, Suite B160, Monterey, CA 93940. The practice phone is (831) 333-4060.
- Monterey Peninsula Surgery Center - Ryan Ranch2 Upper Ragsdale Drive, Bldg B, Suite B160, Monterey, CA 93940Phone(831) 333-4060
Source: Dmand AI Affiliation Data
Dr. Michael G. Klassen is affiliated with 2 sites of care and 2 medical groups
Dr. Klassen's primary practice is Monterey Peninsula Surgery Center - Ryan Ranch in Monterey, California. The medical group on file is Athena Medical Group. Dmand AI also links Dr. Klassen to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael G. Klassen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Klassen practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Monterey Peninsula Surgery Center - Ryan Ranch | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael G. Klassen is one of 2,056 orthopedic surgeons in California
Orthopaedic surgery is Dr. Klassen's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Klassen is board certified in orthopaedic sports medicine by the American Board of Orthopaedic Surgery. Dmand AI has Dr. Klassen's licenses on file in 4 states: California, Nevada, Arizona and Alabama.
Specialties and state licenses
- Orthopaedic surgery, CaliforniaPrimary
- Nevada license
- Arizona license
- Alabama license
Clinical focus
Dmand AI lists arthritis, joint arthropathy, joint pain, knee arthroscopy, knee injury, lower back pain, muscle pain, fibromyalgia, and limb pain and rotator cuff injury among the conditions Dr. Klassen treats.
Orthopedic surgeons near Dr. Klassen
Counts of orthopedic 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. Michael G. Klassen billed Medicare for 14 services in 2024
CMS data shows 14 Medicare services from Dr. Klassen across 1 procedure code in 2024, all of them office visits, for 21 Medicare patients. Medicare paid $996 for them. Every service was in an office.
Dr. Klassen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 882024: 1484%
Dr. Klassen compared with the California median for orthopedic surgeons, 2024
- Dr. Klassen
- California median
- Medicare services
- 14vs 68398% below
- Medicare patients
- 21vs 21590% below
- Part D claims
- 47vs 7033% below
Medians across 1,844 orthopedic surgeons in California with Dmand AI profiles that report each measure.
Dr. Klassen'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. Klassen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Klassen and other orthopedic surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael G. Klassen treated 21 Medicare patients in 2024, average age 75
CMS counts 21 Medicare patients who saw Dr. Klassen in 2024. 71% of them have high cholesterol, and 67% have high blood pressure. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Klassen's median patient age at 70, with 55% women.
Chronic conditions among Dr. Klassen's Medicare patients, 2024
- High cholesterol71%
- High blood pressure67%
- Arthritis62%
Share of Medicare patients with each condition. A patient can have several.
Dr. Klassen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women55%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael G. Klassen wrote 18 Medicare Part D claims in 2024
In 2024, Dr. Klassen wrote 18 Medicare Part D claims. 100% of them were for generic drugs. They cover 2 drugs, with $475 in total drug cost. In 2016, CMS named 12 claims across 1 drug.
Dr. Klassen's most prescribed drugs by claims, 2017
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, 2016 to 2017
- 2016
- 2017
- Claims for drugs CMS names
- 2016: 122017: 47292%
Drugs named by CMS: 2 in 2017, 1 in 2016.
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. Michael G. Klassen received $646 in industry payments from 2016 to 2018
CMS Open Payments shows 37 general payments to Dr. Klassen from 14 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Electronic Waveform Lab, Inc. paid the most, $162.
General payments to Dr. Klassen by program year, 2016 to 2018
General payments to Dr. Klassen by kind, 2016 to 2018
- Food and beverage$644100%
- Travel and lodging$20%
Companies that paid Dr. Klassen the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael G. Klassen graduated from David Geffen School of Medicine at UCLA
Dr. Klassen graduated from David Geffen School of Medicine at UCLA in 1989.
- Medical school
- Board certified in orthopaedic sports medicine
- Board certified in orthopaedic surgery
- Board certified in orthopaedic sports medicine
- Board certified in orthopaedic surgery
Source: Dmand AI Professional Profile Data
Dr. Michael G. Klassen accepts plans from 9 insurance carriers
Dr. Klassen is in network with 9 carriers, including United Healthcare, Aetna and Elevance. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
- United Healthcare
- Aetna
- Elevance
- HCSC
- Alliant Health Plans
- Blue Cross and Blue Shield of Kansas City
- Blue Cross Blue Shield of Michigan
- CMS Medicare
- +1 more carriersWith a free account
Plan types Dr. Klassen accepts, by number of carriers
- PPO6
- HMO5
- Medicare2
- EPO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael G. Klassen'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Michael G. Klassen
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. Michael G. Klassen's NPI number?
Dr. Michael G. Klassen's NPI number is 1932234952. It was assigned on February 22, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael G. Klassen?
Dr. Michael G. Klassen is an orthopedic surgeon in Monterey, California. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Michael G. Klassen practice?
Dr. Klassen practices at 2 Upper Ragsdale Drive, Bldg B, Suite B160, Monterey, CA 93940. Dr. Klassen's primary practice is Monterey Peninsula Surgery Center - Ryan Ranch in Monterey, California. Dmand AI also links Dr. Klassen to 1 group practice or clinic and 1 medical group.
What is Dr. Michael G. Klassen's office phone number?
The practice phone on file for Dr. Klassen is (831) 333-4060.
What is Dr. Michael G. Klassen's medical license number?
Dr. Klassen holds California license G69478, one of the licenses on file in 4 states.
Which states has Dr. Michael G. Klassen been licensed in?
Dmand AI has state licenses on file for Dr. Klassen in California (1990 to 2026), Nevada (2008 to 2027), Arizona (2008 to 2026) and Alabama (1995 to 2007).
What medical group is Dr. Michael G. Klassen part of?
Dr. Klassen is linked to Athena Medical Group. Dmand AI links Dr. Klassen to 1 more medical group.
Does Dr. Michael G. Klassen accept Medicare?
Yes. CMS data shows Dr. Klassen billed Medicare for 14 services in 2024.
How many Medicare patients does Dr. Michael G. Klassen see?
CMS counts 21 Medicare patients who saw Dr. Klassen in 2024, with an average age of 75.
Is Dr. Michael G. Klassen board certified?
Yes. Dr. Klassen is board certified in orthopaedic sports medicine by the American Board of Orthopaedic Surgery.
Show 6 more questionsShow fewer questions
What services does Dr. Michael G. Klassen bill to Medicare?
In 2024, Dr. Klassen's most billed Medicare services were office visit, established patient (99213).
Where did Dr. Michael G. Klassen go to medical school?
Dr. Klassen graduated from David Geffen School of Medicine at UCLA in 1989.
What drugs does Dr. Michael G. Klassen prescribe most?
In 2017 Medicare Part D data, Dr. Klassen's most prescribed drugs by claims were Hydrocodone-Acetaminophen and Tramadol HCl.
Has Dr. Michael G. Klassen received payments from drug or device companies?
CMS Open Payments shows $646 in general payments to Dr. Klassen from 14 companies from 2016 to 2018. The largest total came from Electronic Waveform Lab, Inc.
How long has Dr. Michael G. Klassen been practicing?
Dr. Klassen graduated from medical school in 1989, 37 years ago.
What insurance does Dr. Michael G. Klassen accept?
Dr. Klassen is in network with 9 carriers, including United Healthcare, Aetna and Elevance. PPO plans come from the most carriers, 6. Check the plan with the practice before a visit.
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