Chad Edward Maclachlan, MD
Orthopaedic Surgery Physician · Vallejo, CA
Chad Edward Maclachlan, MD is an orthopaedic surgery physician with a practice address in Vallejo, California, and NPI 1154493427, issued on Nov 14, 2006. Check the license (California A87183, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chad Edward Maclachlan
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- A87183 CA
Self-reported in NPPES; status is on the state search - Practice location
- 975 Sereno Dr, Vallejo, CA 94589
- Phone
- (775) 588-3636
- Enumerated
- Nov 14, 2006
- Record last updated
- Dec 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (775) 588-1299
- Medicare enrollment
- Enrolled (PECOS I20080418000536); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 975 Sereno Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joel Aandahl, NPAdult Health Nurse Practitioner1891423653
- Noman Absar, MDCritical Care Medicine (Internal Medicine) Physician1205908951
- Anthony Acquaviva, MDUrology Physician1457439283
- Jhonnard James Acuna, CRNACertified Registered Nurse Anesthetist1205997327
- Omid AfshariPharmacist1184165391
- Eesha AftabStudent in an Organized Health Care Education/Training Program1770421687
Verify Chad Edward Maclachlan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A87183Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
82 Medicare Part D claims for 35 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 44 claims were for opioids.
Most prescribed
- Oxycodone Hcl35 claims
- Ondansetron Odt22 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncVallejo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chad Edward Maclachlan among 2,276 orthopaedic surgery physician records in California
Chad Edward Maclachlan, MD is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2003 among the 1,347 with a school on file
- Record last updated2021 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in Vallejo → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Dennis Berge, MDVallejo, CA 945891710051024
- Mark Bernstein, MDVallejo, CA 945891790859007
- Mark Charney, MDVallejo, CA 945891265510085
- Dennis Chin, MDVallejo, CA 945891366520264
- Wendell Ferguson, MDVallejo, CA 945891437237278
- Robert Gomez, MDVallejo, CA 945891033129028
- Yassamin Hazrati, MDVallejo, CA 945891558449371
- Steven McGrath, MDVallejo, CA 945891639257462
Common questions
What is Chad Edward Maclachlan, MD's NPI number?
Chad Edward Maclachlan, MD's National Provider Identifier (NPI) is 1154493427, issued on Nov 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Chad Edward Maclachlan, MD located?
The NPPES record lists a practice address at 975 Sereno Dr, Vallejo, CA, 94589. Phone: (775) 588-3636. Providers update this record themselves, so call before visiting.
How can I verify Chad Edward Maclachlan, MD's license?
NPPES lists California license number A87183, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Chad Edward Maclachlan, MD prescribe under Medicare Part D?
In 2024, Chad Edward Maclachlan, MD had 82 Medicare Part D claims for 35 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.