Physician Profile
Unclaimed ProfileAbout Dr. Welch
Mark Arnold Welch, D.O. is a healthcare provider in Loma Linda, CA specializing in psychiatry. Medicare claims data shows Mark provided 474 services to 381 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (909) 558-6094
- Email not available
Practice Locations
11374 MOUNTAIN VIEW AVE
Loma Linda, CA 92354
Conditions Commonly Evaluated or Treated
Within Psychiatry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Anxiety, trauma, and obsessive-compulsive
- Acute stress disorder
- Agoraphobia
- Generalized anxiety disorder
- Obsessive-compulsive disorder
- Panic disorder
- Post-traumatic stress disorder
- Social anxiety disorder
- Specific phobias
Mood disorders
- Bipolar I disorder
- Bipolar II disorder
- Cyclothymic disorder
- Depression during or after pregnancy
- Major depressive disorder
- Persistent depressive disorder
- Premenstrual dysphoric disorder
- Seasonal affective disorder
Psychotic disorders
Substance-related and addictive
- Alcohol use disorder
- Gambling disorder
- Opioid use disorder
- Sedative, hypnotic, or anxiolytic use disorder
- Stimulant use disorder
Cognitive and adjustment
Eating, sleep, and somatic
- Anorexia nervosa
- Binge-eating disorder
- Bulimia nervosa
- Illness anxiety disorder
- Insomnia
- Somatic symptom disorder
Neurodevelopmental and behavioral
- Attention-deficit/hyperactivity disorder
- Autism spectrum disorder
- Conduct disorder
- Intellectual disability
- Oppositional defiant disorder
Personality and dissociative
- Antisocial personality disorder
- Borderline personality disorder
- Dissociative disorders
- Narcissistic personality disorder
Procedures & services
Assessment
- Cognitive and memory screening
- Comprehensive psychiatric evaluation
- Medication review and management
- Suicide and safety risk assessment
Therapy and care
Procedures Most Often Billed to Medicare
474 services · 381 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Sleep study including heart rate, breathing, airflow, and effort | Treatment | 95806 |
103 |
| Sleep study in sleep lab with continuous airway pressure (6 years or older) | Treatment | 95811 |
75 |
| Sleep study in sleep lab (6 years or older) | Treatment | 95810 |
42 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
161 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
61 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
32 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other psychiatry specialists at this location 6
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other psychiatry specialists in Loma Linda 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2003 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Sleep study including heart rate, breathing, airflow, and effort 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Welch specialize in?
Dr. Welch is a psychiatry in Loma Linda, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PSYCHIATRY”.
NPI registry
Where is Dr. Welch located?
Dr. Welch is listed at 11374 MOUNTAIN VIEW AVE, Loma Linda, CA 92354. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Welch's phone number?
The number on file is (909) 558-6094. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Welch?
Dr. Welch's National Provider Identifier is 1225063555. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Welch go to medical school?
Dr. Welch attended Other, graduating in 2003. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Welch have?
Dr. Welch has 23 years experience. Calculated from a graduation year of 2003, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Welch do most often?
According to Medicare billing data, Dr. Welch provides treatments such as sleep study including heart rate, breathing, airflow, and effort and sleep study in sleep lab with continuous airway pressure, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Welch's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Welch. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.